describe the function as ND structure of heart
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Explanation:
Structure of the Heart
It is made up of four chambers and several valves that regulate the normal flow of blood within the body. Two chambers called atria are located in the upper portion of the heart and receive oxygen-free blood.
Answered by
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Explanation:
Structure of the Heart
It is made up of four chambers and several valves that regulate the normal flow of blood within the body. Two chambers called atria are located in the upper portion of the heart and receive oxygen-free blood.
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