Pulmonary valve
Pulmonary valve
The Pulmonary valve (pronounced: pul-MON-ary VALV), also known as the pulmonic valve, is one of the four valves in the heart. It is a semilunar valve that lies between the right ventricle and the pulmonary artery.
Etymology
The term "pulmonary" is derived from the Latin word "pulmo", meaning "lung", and the term "valve" is derived from the Latin word "valva", meaning "folding door".
Function
The primary function of the pulmonary valve is to prevent the backflow of blood from the pulmonary artery into the right ventricle during diastole. It opens when the pressure in the right ventricle exceeds the pressure in the pulmonary artery, allowing blood to flow into the lungs.
Related Terms
- Semilunar valve: A type of heart valve, including the pulmonary valve and the aortic valve, that has half-moon-shaped flaps.
- Right ventricle: The chamber of the heart that pumps deoxygenated blood to the lungs through the pulmonary valve.
- Pulmonary artery: The artery carrying blood from the right ventricle of the heart to the lungs for oxygenation.
- Diastole: The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
See Also
External links
- Medical encyclopedia article on Pulmonary valve
- Wikipedia's article - Pulmonary valve
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