Question

describe double circulatin of blood in human beings. why is it necessary​

Answer 1

This means that during a single cycle, the blood goes twice in the heart. ... This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscles.

Answer 2

Answer:

The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice: the pulmonary circuit is between the heart and lungs. the systemic circuit is between the heart and the other organs.

Explanation:

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