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How does a heart function?

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The heart is the center of your circulatory system, which is a network of blood vessels that deliver blood to every part of your body. The blood carries oxygen and other nutrients that all body organs need to stay healthy and to work properly. The heart is also a muscle and its job is to pump blood throughout your body. The task of your heart is to pump enough blood to deliver a continuous supply of oxygen and other nutrients to the brain and the other vital organs.



The heart is divided into two separate pumping systems, the right side and the left side. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.


Your heart have four chambers that pump blood, two on the right side and two on the left. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve. The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mistral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.


Heart Definitions Superior Vena Cava- receives blood from the head and arms and chest and empties into the right atrium of the heart;

Right Atrium- the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus;

Left Atrium- the left upper chamber of the heart that receives blood from the pulmonary veins;

Right Ventricle- the chamber on the right side of the heart that receives venous blood from the right atrium and pumps it into the pulmonary trunk;

Left Ventricle- the chamber on the left side of the heart that receives arterial blood from the left atrium and pumps it into the aorta;

Pulmonary artery- an artery conveying venous blood from the right ventricle of the heart to the lungs;

Aorta-the main trunk of the arterial system, conveying blood from the left ventricle of the heart to all of the body except the lungs;

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