The heart
- Created by: siobhan
- Created on: 05-05-13 16:51
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- The Heart
- the heart is a muscular organ that pumps blood around the body. it's actually two pumps held together
- the right pump forced deoxygenated blood to the lungs where it picks up oxygen and loses carbon dioxide
- After returning to the heart, the oxygenated blood is then pumped to the rest of the body by the left pump
- The heart has four chambers. The upper ones called atria receive blood from the vena cava on the right and the pulmonary vein on the left.
- The atria contract to move blood to the lower chambers called the ventricles
- When the ventricles contract they force blood out into the pulmonary artery on the right side and into the aorta on the left side
- When the ventricles contract they force blood out into the pulmonary artery on the right side and into the aorta on the left side
- The atria contract to move blood to the lower chambers called the ventricles
- Valves in the heart prevent blood from flowing in the wrong direction.
- The heart muscle is supplied with oxygenated blood by the coronary arteries
- The action of the two sides of the heart results in a double circulation
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