The valve between the right atrium and right ventricle . It has three flaps or cusps. Ultrasound High-frequency sound vibrations used to create images that help in medical diagnosis. Echocardiography, which shows a picture of the heart, and the Doppler test, which analyzes blood flow, both use ultrasound. Valve A structure made up of membrane flaps that lies between two chambers of the heart, or between a chamber of the heart and a blood vessel.
Open valves allow blood flow in only one direction.
Closed valves normally prevent blood from passing through an opening. Vascular Concerning the blood vessels. The walls of veins are thin and contain less muscle tissue than arteries. Ventricle A pumping chamber of the heart. The right ventricle pumps blood through the pulmonary artery to the lungs, and the left ventricle pumps blood out through the aorta to the body.