Definitions for "Heart valves"
There are four valves in the heart: the tricuspid and the mitral valve, which lie between the atria and ventricles, and the pulmonic and aortic valves, which lie between the ventricles and the blood vessels leaving the heart. The heart valves help to maintain one-way blood flow through the heart
are thin flexible flaps of connective tissue normally permitting one-way blood flow through the heart.
Valves within the heart that open and close automatically to control blood flow into, through, and out of the heart.