Why is double circulation necessary in human beings ?

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Ans. During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.l

Answer

Because both oxygen and carbon dioxide have to be transported by the blood, the heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide.The human heart is divided into four chambers − the right atrium, the right ventricle, the left atrium and the left ventricle. Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left, the left atrium. The left atrium relaxes when it is collecting this blood. It then contracts, while the next chamber, the left ventricle, expands, so that the blood is transferred to it. When the muscular left ventricle contracts in its turn, the blood is pumped out to the body.

Answer

Answer

Double Circulation in Human Beings
Double circulation is the circulation of blood through two separate circuits in the body, namely the pulmonary circulation and systemic circulation. It is essential for human beings due to the following reasons:

Efficient Oxygenation
- In pulmonary circulation, the blood is pumped from the heart to the lungs to pick up oxygen and release carbon dioxide. This oxygenated blood then returns to the heart before being pumped to the rest of the body in systemic circulation.
- This separation of oxygenated and deoxygenated blood ensures that oxygen-rich blood is efficiently delivered to all body tissues, allowing for effective oxygenation of cells.

Optimal Nutrient Delivery
- Systemic circulation carries oxygenated blood from the heart to various organs and tissues in the body. This blood also delivers essential nutrients and removes waste products generated by cellular metabolism.
- The separation of pulmonary and systemic circulation ensures that nutrients are effectively transported to cells for energy production and other metabolic processes.

Thermoregulation
- Double circulation helps in maintaining body temperature by regulating blood flow. For instance, during exercise or exposure to cold environments, blood flow to the skin increases to dissipate heat or conserve warmth.
- Systemic circulation plays a crucial role in distributing heat throughout the body to maintain optimal temperature for cellular functions.

Waste Removal
- In systemic circulation, deoxygenated blood returns to the heart before being pumped to the lungs for the removal of carbon dioxide and other waste products.
- Double circulation ensures that waste materials generated by cellular activities are efficiently eliminated from the body, promoting overall health and well-being.
In conclusion, double circulation is necessary in human beings to ensure efficient oxygenation, optimal nutrient delivery, thermoregulation, and waste removal. This complex system of blood flow plays a crucial role in maintaining homeostasis and supporting various physiological functions in the body.

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