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Describe double circulation of blood in human beings. Why is it necessary?
Double circulation: The circulatory system in which the blood travels twice through the heart in one complete cycle is known as double circulation.
Double circulations do not allow mixing the oxygenated and deoxygenated blood by transporting the blood twice through the heart. Thus, it helps in maintaining high blood pressure and enables oxygenated blood to flow toward different tissues and organs of the body.
Given below is an image of the human heart with its main parts.
The four-chambered heart contains two pumps that operate simultaneously. The right side of the heart stores blood that has been deoxygenated and delivered to the lungs via pulmonary circulation. The left half of the heart functions as an additional pump. It includes just oxygenated blood from the lungs and is transported throughout the body via systemic circulation. Thus, the heart does not mix oxygenated and deoxygenated blood. Blood circulates twice via the heart, in pulmonary and systemic circulations. The term for this sort of circulation is double circulation.
Humans require double circulation to prevent the mixing of oxygenated and deoxygenated blood, which increases the efficiency of the circulatory system and aids in maintaining a consistent body temperature.
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