Leaflet

Leaflet (anatomy)

A leaflet in the context of anatomy refers to one of the thin, flat structures that make up various parts of the body, such as the heart and lymph nodes. The term is most commonly used to describe the components of the heart valves.

Heart Valves

The heart contains four valves, each composed of two or three leaflets. These include the mitral valve, which has two leaflets, and the tricuspid valve, pulmonary valve, and aortic valve, each of which has three leaflets. The leaflets of the heart valves function to ensure unidirectional blood flow through the heart.

Mitral Valve

The mitral valve, also known as the bicuspid valve, is located between the left atrium and the left ventricle of the heart. It has two leaflets, which open to allow blood to flow from the left atrium to the left ventricle, and close to prevent backflow.

Tricuspid Valve

The tricuspid valve is located between the right atrium and the right ventricle of the heart. It has three leaflets, which function in the same way as those of the mitral valve, but for the right side of the heart.

Pulmonary Valve

The pulmonary valve is located between the right ventricle and the pulmonary artery. It has three leaflets, which open to allow blood to flow from the right ventricle to the pulmonary artery, and close to prevent backflow.

Aortic Valve

The aortic valve is located between the left ventricle and the aorta. It has three leaflets, which open to allow blood to flow from the left ventricle to the aorta, and close to prevent backflow.

Lymph Nodes

In the lymphatic system, leaflets are found in the lymph nodes, where they function to prevent the backflow of lymph.

See Also

• Heart
• Heart valve
• Lymph node

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