Describe double circulation of blood in human beings why is it necessary?

Question: Describe double circulation of blood in human beings why is it necessary?

Double circulation of blood in human beings is the process of blood flowing through two separate circuits: the pulmonary circuit and the systemic circuit. The pulmonary circuit carries deoxygenated blood from the right ventricle of the heart to the lungs, where it gets oxygenated and returns to the left atrium of the heart. The systemic circuit carries oxygenated blood from the left ventricle of the heart to all the organs and tissues of the body, where it delivers oxygen and nutrients and picks up carbon dioxide and wastes, and returns to the right atrium of the heart. Double circulation of blood is necessary for human beings because it ensures efficient delivery of oxygen and removal of carbon dioxide, maintains optimal blood pressure, and prevents mixing of oxygenated and deoxygenated blood.

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