Valve

Definition

In the context of heart anatomy, a valve is a structure that ensures the unidirectional flow of blood through the heart and prevents backflow. The heart contains four main valves that regulate blood flow between its chambers and to the rest of the body.

Related terms

Atrioventricular Valves:

These are valves located between the atria and ventricles of the heart, specifically named tricuspid and mitral valves, facilitating blood flow from atria to ventricles.

Semilunar Valves: These include the pulmonary and aortic valves located at the bases of the large arteries leaving the heart, ensuring blood flows out of the ventricles without returning.

Endocardium:

The innermost layer of tissue that lines the chambers of the heart and covers its valves, contributing to smooth blood flow within it