Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display semilunar va Valve partly open Openings to coronary arteries semilunar valve Left AV(bicuspid)- Right AV (tricuspid) Valve almost completely closed From R Carola, J. P Harley, and C, R. Noback, Human Anatomy and Physiology. McGraw-Hill, New York, 1990(photos by Dr. Wallace McAlpine). Valves of the heartValves of the heart