The heart is located in the left side of the body behind the breastbone area. The heart is part of the cardiovascular system.
surrounding the heart
The heart is a muscular organ located slightly to left side of and behind the breastbone. It is the size of a fist.
In the heart
The structure located closest to the center of the heart is the myocardium, which is the thick muscular layer responsible for the heart's contraction. Surrounding the myocardium is the endocardium, which lines the heart's chambers. The innermost layer of tissue, the endocardium, is in direct contact with the blood flowing through the heart.
There are two atriums, and they are two major muscular pumps within the human heart that pump it's blood.
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heart
There are many muscles in the human muscular system. The main muscles are the cardiac muscles located near the heart, the biceps muscles, the abdominal muscles and the quadrocept muscles.
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There are two atriums, and they are two major muscular pumps within the human heart that pump it's blood.
heart
Myocardium