Structures, Functions and Evolution of Human Heart (603 words, 1 pages)
HEART The human heart is a specialized, four-chambered muscle that maintains BLOOD flow in the CIRCULATORY SYSTEM. Located in the thorax, it lies left of the body's midline, above and in contact with the diaphragm. It is situated immediately behind the breastbone, or sternum, and between the lungs, with its ...
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