Heart

Heart – Part 1

The dictionary defines a heart anatomically as a hollow, pump-like organ of blood circulation, composed mainly of a rhythmically contracting smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers: a right atrium that receives blood returning from the body via the superior and inferior vena cava, a right ventricle that pumps the blood through the pulmonary artery to the lungs for oxygenation, a left atrium that receives the oxygenated blood via the pulmonary veins and passes it through the mitral valve, and a left ventricle that pumps the oxygenated blood, via the aorta, throughout the body.

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Heart – Part 2 Continue reading