Pulmonic / pulmonary valve

This section is about
Structures of the Heart

The pulmonary valve is one of the semilunar valves of the heart, the other semilunar valve being the aortic valve.

The pulmonary valve has three cusps and opens in ventricular systole when the pressure in the right ventricle rises above the pressure in the pulmonary artery. The function of the pulmonary valve is to prevent blood that is leaving the heart via the right ventricle (into the pulmonary trunk - of the pulmonary artery), from flowing backwards and so re-entering the heart.

This is important because backflow of blood through an incompletely closed valve such as the pulmonary valve (a condition known as 'regurgitation') can lead to congestive heart failure, in which the heart can no-longer pump enough blood out to supply the body's needs for oxygen.

More about the heart and blood circulation:
See the following for more about the heart, blood, blood circulation, disorders of the blood circulation system, and related topics.

The following might also be of interest:

Haematology at a Glance
Heart Healthy Smart Recipes - Smart Eating for Heart Health
The Prevent and Reverse Heart Disease Cookbook
Pathophysiology of Blood Disorders

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