How many leaflets are in the pulmonary valve?

How many leaflets are in the pulmonary valve?

They close to keep blood from flowing backward during the other half of the heartbeat. The mitral valve has only two leaflets; the aortic, pulmonic and tricuspid valves have three.

What are the pulmonary valves called?

pulmonic valve
The pulmonary valve (sometimes referred to as the pulmonic valve) is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps.

Which heart valve has 3 leaflets?

A normal aortic valve (see below) has three leaflets (also known as flaps or cusps). These open and close to control the flow of blood into the aorta from the left ventricle of the heart as it beats.

What are the names of each valve?


Valve Number of flaps/cusps location
Atrioventricular valves 3 or 2
Tricuspid valve 3 between the right atrium and right ventricle.
Bicuspid or mitral valve 2 between the left atrium and left ventricle.
Semilunar valves 3 (half-moon shaped) flaps

How many leaflets does the pulmonary valve have?

While the aortic, tricuspid and pulmonary valves typically have three leaflets (also known as heart valve flaps), the mitral valve only has two leaflets. Here is a diagram of the human heart valves illustrating this point.

What are the two valve leaflets?

Leaflets. The mitral valve has two leaflets.

  • Commissures. The commissures of the mitral valve are the areas where the anterior and posterior leaflets meet.
  • Chordae tendinae. The chordae tendinae are fan-shaped connective structures that connect the leaflets to papillary muscles in the heart.
  • Zone of coaptation.
  • Mitral annulus.
  • Do mitral valve replacements have two or three leaflets?

    The mitral valve is the only human heart valve that is bicuspid. Bicuspid means the valve has only two leaflets. Alternatively, each of the other heart valves (aortic, pulmonary, tricuspid) have three distinct valve leaflets – also known as heart valve flaps.

    What is the normal valve area of the pulmonary valve?

    In normal conditions, the pulmonic valve prevents regurgitation of deoxygenated blood from the pulmonary artery back to the right ventricle. It is a semilunar valve with 3 cusps, and it is located anterior, superior, and slightly to the left of the aortic valve.