Anterior view of transparent heart with focus on bicuspid valves.

Superior view of the heart with atria removed to illustrate appearance of aortic and pulmonary valves during systole.

Anterior view of transparent heart with focus on tricuspid valves.

Superior view of a heart with the great vessels removed to reveal the pulmonary and aortic valves.

Inferior view of the left chamber of the heart showing the mitral and aortic valves.

Valves of proximal part of femoral and great saphenous veins, anterior view. A. Structure of valves. The valve is usually composed of two cusps and permits blood flow toward the heart, but not in the reverse direction.

Posterior view of a transparent heart highlighting the location and form of the ventricles.

Posterior view of a transparent heart highlighting the location and form of the atria.

Right anterior oblique view of a heart to show anterior and posterior branching of the highlighted right coronary artery.

Superior view of heart valve showing damage caused by rheumatic fever.

Anterior view of the base of the aorta and aortic valve with the coronary arteries.

Anterior view of a heart showing anterior and posterior branching of the highlighted left coronary artery.

The valves of the heart as viewed from above.