Copyright@ The McGraw-Hill Companies, Inc. Permission required for reproduction or display (a Pulmonary semilunar valve Valve partly open arteries Aortic semilunar valve Left AV(bicuspid)- valve Right AV (tricuspid) Valve almost completely close 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 4