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Which of these is correct about the heart of Pheretima-
- a)They are devoid of values
- b)They have two chambers
- c)Some hearts have fewer valves than other
- d)They are found in 8-12 segments
Correct answer is option 'C'. Can you explain this answer?
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Which of these is correct about the heart ofPheretima-a)They are devoi...
Heart valves keep the blood fluid flowing in one direction in the same way most pumps work. The heart has two types of valves that keep the blood flowing in the correct direction. The valves between the atria and ventricles are called atrioventricular valves (also called cuspid valves), while those at the bases of the large vessels leaving the ventricles are called semilunar valves.
The right atrioventricular valve is the tricuspid valve. The left atrioventricular valve is the bicuspid, or mitral, valve. The valve between the right ventricle and pulmonary trunk is the pulmonary semilunar valve. The valve between the left ventricle and the aorta is the aortic semilunar valve.
When the ventricles contract, atrioventricular valves close to prevent blood from flowing back into the atria. When the ventricles relax, semilunar valves close to prevent blood from flowing back into the ventricles.
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Which of these is correct about the heart ofPheretima-a)They are devoi...
Answer:
The correct statement about the heart of Pheretima is C: Some hearts have fewer valves than others.
Here is a detailed explanation:
Heart of Pheretima:
- Pheretima, also known as the earthworm, has a relatively simple circulatory system.
- The heart of Pheretima is a tubular structure that runs the length of its body.
- It is located in the dorsal part of the body cavity.
- The heart consists of several contractile segments, each corresponding to a body segment.
- The number of heart segments varies depending on the species of earthworm.
- The heart segments are interconnected, forming a continuous tube.
Number of Valves:
- Each heart segment in Pheretima is equipped with valves.
- The valves prevent the backward flow of blood within the heart.
- However, the number of valves may vary among different heart segments.
- Some heart segments may have fewer valves compared to others.
- This difference in the number of valves in different heart segments is a characteristic feature of Pheretima's circulatory system.
In summary, the heart of Pheretima has some segments that have fewer valves than others, making option C the correct statement.
The correct statement about the heart of Pheretima is C: Some hearts have fewer valves than others.
Here is a detailed explanation:
Heart of Pheretima:
- Pheretima, also known as the earthworm, has a relatively simple circulatory system.
- The heart of Pheretima is a tubular structure that runs the length of its body.
- It is located in the dorsal part of the body cavity.
- The heart consists of several contractile segments, each corresponding to a body segment.
- The number of heart segments varies depending on the species of earthworm.
- The heart segments are interconnected, forming a continuous tube.
Number of Valves:
- Each heart segment in Pheretima is equipped with valves.
- The valves prevent the backward flow of blood within the heart.
- However, the number of valves may vary among different heart segments.
- Some heart segments may have fewer valves compared to others.
- This difference in the number of valves in different heart segments is a characteristic feature of Pheretima's circulatory system.
In summary, the heart of Pheretima has some segments that have fewer valves than others, making option C the correct statement.
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Which of these is correct about the heart ofPheretima-a)They are devoid of valuesb)They have two chambersc)Some hearts have fewer valves than otherd)They are found in 8-12 segmentsCorrect answer is option 'C'. Can you explain this answer?
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Which of these is correct about the heart ofPheretima-a)They are devoid of valuesb)They have two chambersc)Some hearts have fewer valves than otherd)They are found in 8-12 segmentsCorrect answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Which of these is correct about the heart ofPheretima-a)They are devoid of valuesb)They have two chambersc)Some hearts have fewer valves than otherd)They are found in 8-12 segmentsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of these is correct about the heart ofPheretima-a)They are devoid of valuesb)They have two chambersc)Some hearts have fewer valves than otherd)They are found in 8-12 segmentsCorrect answer is option 'C'. Can you explain this answer?.
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