The Heart
The heart lies in the center and more towards the left of the chest in an area called the mediastinum. As the heart is tilted slightly to the left you feel the beat of your heart on the left side at the apex. Here the beat is supposed to be the strongest.
The heart is about the size of a
fist and weighs less than a pound. It is pinkish grey in color and is mainly
made up of muscle called myocardium. It is hollow and divided into a left and a
right side. Each side has two chambers, the one above is known as the atrium
and the one below, ventricle.
The
heart pumps life-sustaining blood through the body. The right side of the heart
supplies blood to the lungs, while the left, the stronger side, supplies blood
to the rest of the body. Oxygen and glucose are supplied to the body. Carbon
dioxide and waste gases collected in the blood are passed into the right atrium
and via the right ventricle and pulmonary artery, are pumped out through the
lungs. Blood from the lungs takes in oxygen which is breathed in by
respiration. This blood goes to the left atrium and then to the left ventricle
where it is pumped out from aorta to the rest of the body.
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