semilunar valves


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Related to semilunar valves: cardiac cycle, tricuspid valve

semilunar valves

The crescent-shaped valves, each having three cusps, situated one at the beginning of the AORTA and the other at the origin of the PULMONARY ARTERY. These valves allow blood to flow only in a direction away from the heart.
References in periodicals archive ?
Blanco, "Development of mouse semilunar valves," Anatomy and Embryology, vol.
2] indicates pulmonary hypertension (with RV overload) or congenital heart disease involving the semilunar valves.
The semilunar valves are formed from three small tubercles of tissue that are (overriding), a small pulmonary outflow tract, and the inability of the ventricular septum to close.