Explain about heart

1.	Explain about heart
Answer» ? The heart is an organ that pumps blood throughout the body. It comprises four chambers:\tAtria (upper chambers)\tVentricles (lower chambers)The wall of the heart is made up of three layers:\tEpicardium-\xa0This is a protective layer made of connective tissues.\tMyocardium-\xa0This layer forms the heart muscles.\tEndocardium-\xa0This is the innermost layer and protects the valves and the heart.

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