Question

why the human heart have double circulation in blood​

Answer 1

Explanation:

• The human circulatory system has three key components: blood vessels, blood and the heart. It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.

Answer 2

Answer:

Hello :D

It is called a double circulatory system because blood passes through the heart twice, The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.

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