In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a humanandrsquo;s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer?

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In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.

Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.

Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.

How would Scientist I respond to Scientist II's claims that a human's weight disproves the theory that a liver pumps blood?

a)
When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.
b)
The temperature of the blood would make it feel lighter in the human body.
c)
The weight of blood cannot be accurately measured by modern tools.
d)
The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.

Correct answer is option 'D'. Can you explain this answer?

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In the 17th century, scientists were just beginning to understand the ...

Scientist I believes that blood is consumed by the organs. If the blood is consumed at the same rate as which it is produced, there would be no noticeable change.

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In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.Q. Why does Scientist I compare the arteries and veins to smell and taste?

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Directions:Read the passages and choose the best answer to each question.PassageEarth’s habitability is sustained by the sun. Currently, the sun provides enough light and warmth to maintain temperature conditions that can support life on our planet. It is undisputed that the sun is a star. All stars go through phases where they change in size, temperature, and brightness. Two scientists present their views on how long Earth will remain habitable.Scientist 1Earth’s sun has another 7 billion years before it enters the Red Giant phase. Currently, Earth could not sustain human life during the Red Giant phase. However, it is important not to believe that human life on Earth will immediately cease to exist as we know it in 7 billion years. Technology has played a huge role in helping humans adapt to conditions on this planet. We humans have 7 billion years to advance technology and ﬁnd solutions to adapt to the atmospheric changes the Red Giant phase would bring. For instance, creating a large sunshade to protect Earth would allow life to continue even when the sun enters the Red Giant phase. Another solution would be to develop technology that would stir the sun and bring new hydrogen to the sun’s core. This would greatly extend the current phase that our sun is in. There is enough time and incentive to discover ways to thwart the natural progress of nature. Therefore, I believe that human life on this planet will exist indeﬁnitely.Scientist 2The sun will enter its Red Giant phase in about 7 billion years. However, new models suggest that Earth has less than a billion years before atmospheric carbon dioxide levels drop to levels that can no longer support photosynthesis.This would lead to a dramatic temperature increase. Once Earth’s average temperature rises to above 70 C, the oceans will evaporate and Earth’s water sources will be almost completely eliminated. One billion years is not long enough for humans to evolve in order to meet large atmospheric and environmental changes, or to develop the technology needed to make Earth habitable. In a billion years, atmospheric changes will eliminate all life on Earth as we know it. Humans need to accept the reality that advanced life ﬂourishes for only a limited period of time. Science ﬁction— inspired plans to create space colonies or massive sunshades are unrealistic and will not likely be developed in the next billion years.Q.The views of both scientists are similar because they both argue that

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Directions:Read the passages and choose the best answer to each question.PassageEarth’s habitability is sustained by the sun. Currently, the sun provides enough light and warmth to maintain temperature conditions that can support life on our planet. It is undisputed that the sun is a star. All stars go through phases where they change in size, temperature, and brightness. Two scientists present their views on how long Earth will remain habitable.Scientist 1Earth’s sun has another 7 billion years before it enters the Red Giant phase. Currently, Earth could not sustain human life during the Red Giant phase. However, it is important not to believe that human life on Earth will immediately cease to exist as we know it in 7 billion years. Technology has played a huge role in helping humans adapt to conditions on this planet. We humans have 7 billion years to advance technology and ﬁnd solutions to adapt to the atmospheric changes the Red Giant phase would bring. For instance, creating a large sunshade to protect Earth would allow life to continue even when the sun enters the Red Giant phase. Another solution would be to develop technology that would stir the sun and bring new hydrogen to the sun’s core. This would greatly extend the current phase that our sun is in. There is enough time and incentive to discover ways to thwart the natural progress of nature. Therefore, I believe that human life on this planet will exist indeﬁnitely.Scientist 2The sun will enter its Red Giant phase in about 7 billion years. However, new models suggest that Earth has less than a billion years before atmospheric carbon dioxide levels drop to levels that can no longer support photosynthesis.This would lead to a dramatic temperature increase. Once Earth’s average temperature rises to above 70 C, the oceans will evaporate and Earth’s water sources will be almost completely eliminated. One billion years is not long enough for humans to evolve in order to meet large atmospheric and environmental changes, or to develop the technology needed to make Earth habitable. In a billion years, atmospheric changes will eliminate all life on Earth as we know it. Humans need to accept the reality that advanced life ﬂourishes for only a limited period of time. Science ﬁction— inspired plans to create space colonies or massive sunshades are unrealistic and will not likely be developed in the next billion years.Q.The passage argues that Scientists 1 and 2 disagree on

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Directions:Read the passages and choose the best answer to each question.PassageThe Earth’s magnetic ﬁeld is one of its most signiﬁcant natural phenomena. For centuries, the ﬁeld has been used to aid navigation and exploration, and has been vital to many major discoveries. The magnetic ﬁeld of the Earth extends several thousands of miles into space. It has the effect of shielding the Earth from solar wind, protecting the planet from dangerous high-energy particles and radiation. The exact source of the Earth’s magnetic ﬁeld is not certain. The following two Scientists attempt to explain the phenomenon.Scientist 1The Earth’s magnetic ﬁeld is similar to that of a bar magnet tilted 11 degrees from the spin axis of the Earth.The magnetic ﬁeld of a bar magnet, or any other type of permanent magnet, is created by the coordinated motions of electrons within iron atoms. It is widely accepted that the Earth’s core consists of metals. The inner core is 70% as wide as the moon and consists of a solid iron ball, which would exhibit properties of ferromagnetism (the natural magnetic tendency of iron). The core has its own rotation and is surrounded by a “sea” of molten rock. The magnetic ﬁeld grows and wanes, and the Earth’s poles drift and occasionally ﬂip as the rotation of the core changes. The poles of the magnetic ﬁeld have “ﬂipped” many times due to the ﬂuctuations in the rotation of the solid inner core. Other ﬂuctuations in the magnetic ﬁeld that can occur on a daily basis are largely the result of interference by solar wind.Scientist 2The Earth’s magnetic ﬁeld is attributed to a dynamo effect of circulating electric current in the molten outer core. Electric currents cause magnetic ﬁelds; therefore, the circulating electric currents in the Earth’s molten metallic core are the origin of the magnetic ﬁeld. When conducting ﬂuid ﬂows across an existing magnetic ﬁeld, electric currents are induced, creating another magnetic ﬁeld. When this magnetic ﬁeld reinforces the original magnetic ﬁeld, a dynamo is created which sustains itself.Sitting atop the hot, iron inner core, the Earth’s molten outer core churns and moves. The outer core also has cyclones or whirlpools powered by the Coriolis effects of Earth’s rotation. These complex and unpredictable motions generate the ﬂuctuating magnetic ﬁeld. The outer core is seething, swirling, and turbulent, which has been detected by the constant changes and reversals in polarity throughout the planet’s history. Further, iron has a special characteristic.When it is hotter than 1043 K, its Curie temperature, iron loses its magnetic properties. Therefore the Earth’s magnetic ﬁeld is caused not by magnetised iron deposits, but mostly by electric currents in the liquid outer core.Q.Do the Scientists differ in their description of the Earth’s magnetic ﬁeld?

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In its refined form, iron is a shiny, silver-gray metal; however, when refined iron is exposed to atmospheric conditions for an extended period of time, its surface becomes flaky, pitted, and red- or orange-colored. This process is known as "rusting," and the new flaky, orange or red substance is called "rust."Below, two scientists discuss how rust forms and the composition of rust.Scientist 1:Both water and oxygen are needed for rust to form. Water is an electrolyte, meaning that it allows ions to move within it. When iron comes into contact with water, some iron naturally dissociates into iron ions (Fe2+) and free electrons. Additionally, when atmospheric oxygen (O2) dissolves in water, some oxygen reacts with water to form hydroxide ions (OH-). Because water allows ions to move freely, iron ions and hydroxide ions combine to form a new compound: iron hydroxide. However, iron hydroxide is not a stable compound. Over time, as water evaporates, it changes into a hydrated form of iron oxide. This is rust.Salts can act as catalysts for rust formation, meaning that they speed up the rate at which rust forms. However, rust can form in pure water, in the absence of added salts.Increasing the ambient temperature increases the rate of rust formation. Additionally, increasing the amount of irons surface area that is exposed to water also increases the rate at which rust forms. However, because a layer of rust is porous to water and oxygen, water and oxygen will continue to cause the interior of a piece of iron to rust even after the irons surface has been rusted.Scientist 2:Attack by acids causes rust to form. In water, acids ionize to create positively-charged hydronium (H+) ions and negatively-charged anions. Hydronium ions are electron-deficient; because of this, they attract electrons from iron. This creates iron ions (Fe2+), which are soluble in water. Once dissolved in water, iron ions react with dissolved atmospheric oxygen (O2) to create iron oxide, or rust.Acids can come from a variety of sources. For example, when carbon dioxide in the atmosphere dissolves in water, carbonic acid (H2CO3) is created. Carbonic acid is the most common cause of rusting. However, other environmental sources of acids exist. Rainwater is normally slightly acidic because it has come into contact with molecules in the atmosphere, like sulfur dioxide and nitrogen oxides. These molecules also dissolve in water to form acids. Additionally, iron itself may contain impurities such as phosphorous and sulfur, which react with water to produce acids. Both acidic environments and impurities within iron itself create the conditions under which iron rusts.Rusting can be prevented by painting the surface of iron, thus preventing it from coming into contact with water, oxygen, and acids. Iron can also be protected in a process called "galvanizing," which involves coating iron in a thin layer of zinc. Because zinc is more reactive than iron, it is corroded while the iron is protected.Boiling water does not contain dissolved oxygen. Suppose that a new piece of iron is immersed in boiling water for an extended period of time. Afterwards, scientists observe that the iron has rusted. How would this affect the arguments of Scientist 1 and Scientist 2?

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In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer?

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In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer?.

Solutions for In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.

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If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice In the 17th century, scientists were just beginning to understand the circulatory system of the heart. The two following viewpoints are the two most popular theories of the day.Scientist I The heart pumps blood through arteries and veins but the two systems are separate. They are similar, just as the senses of smell and taste are when observing food, but ultimately they are two separate systems which perform separate functions. Hot blood flows from the heart, through the arteries, and to the organs which consume the blood much as a human would consume nourishment to survive. Venous blood originates in the liver and follows the veins to the organs where it is similarly consumed.Scientist II The arteries and veins are two parts of one system. Blood flows from the heart, around the body, and back into the heart through the veins like two sets of one way streets. The idea of two systems, each pumping blood to the organs is unreasonable. If the heart can pump 6 oz of blood per minute, then the liver would have to produce 540 pounds of blood per day. A simple measurement of a human’s weight shows how unlikely that solution is. The single circulatory system is far superior as it explains the function of the heart, the arteries, and the veins clearly.How would Scientist I respond to Scientist IIs claims that a humans weight disproves the theory that a liver pumps blood?a)When the liver pumps blood, it is tiring, so there would be a comparable amount of sweat released at the same time.b)The temperature of the blood would make it feel lighter in the human body.c)The weight of blood cannot be accurately measured by modern tools.d)The organs consume the blood at the same rate as which it is being produced, therefore no change in weight would be noticed.Correct answer is option 'D'. 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