An Overview of the Heart: The Engine of Human Life (528 words, 2 pages)
is a specialized, four chambered muscle thatmaintains blood flow in the circulatory system. The heart is located in thethorax, it lies left of the body's midline, above and in contact with thediaphragm. It is behind the breastbone, or sternum, and between the lungs,with its apex tilted to the body's cavity ...
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