Causes
How the Heart Works
A heart is just like a pump. It is a muscular organ of a fist-size, situated slightly left of center in your chest. The heart is divided into four chambers (right atrium, right ventricle, and left atrium, left ventricle). This division prevents mixing of oxygen-rich blood with deoxygenated blood. Deoxygenated blood returns to the heart after circulating through your body.
• The right side of the heart, consist of the right atrium and ventricle, collects and pumps blood to the lungs through the pulmonary arteries.
• The lungs mixing a new supply of oxygen in the blood. The lungs also exhaled carbon dioxide, a waste product.
• Oxygenated blood then enters the left side of the heart, comprising the left atrium and ventricle.
• The left side of the heart pumps blood into the aorta to supply tissues throughout the body with oxygen and nutrients.