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The valves of the heart are located within the chambers of the heart and are responsible for the proper flow of blood through the heart. All of the valves, when functioning normally, act as one-way valves, allowing blood to flow either from one chamber to another, or allowing blood to flow out of the heart, in only one direction. The valves control the flow of blood through the heart. They are opened and closed during the contractions of the heart. The opening and closing functions of the valves are controlled by pressure differences generated within the heart, as well as some muscles located within the heart.
The four valves are known as:
1. The tricuspid valve
2. The pulmonic or pulmonary valve
3. The mitral valve
4. The aortic valve
Ex. 39. Look at picture 4. Read the description of the valves and answer the question: What valve is described in each sentence?
Four types of valves regulate blood flow through your heart:
1. The valve regulates blood flow between the right atrium and right ventricle.
2. The valve controls blood flow from the right ventricle into the pulmonary arteries, which carry blood to your lungs to pick up oxygen.
3. The valve lets oxygen-rich blood from your lungs pass from the left atrium into the left ventricle.
4. The valve opens the way for oxygen-rich blood passing from the left ventricle into the aorta, your body's largest artery, where it is delivered to the rest of your body.
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