. Flow of blood within the body is called


a. heart beat.

b. blood circulation.

c. blood diffusion.

d. blood flow.

Best Answer

b. blood circulation

Explanation: It is two types:

Single Blood circulation: Blood passes through the heart once e.g., fish.

Double Blood circulation: Blood passes through the heart twice e.g., humans. Once the deoxygenated blood passes through the heart. Then oxygenated blood passes through the heart.

 

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