Question

What does the heart consist of or what is it mostly made up of?

Answer 1

The heart is a muscular organ in mostanimals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, as well as assisting in the removal of metabolic wastes. ... The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.

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