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A vertical view of the auriculoventricular and arterial valves of the heart.

Heart Valves

A vertical view of the auriculoventricular and arterial valves of the heart.

Section of heart at level of valves. Labels: P, pulmonary artery, with flaps of semilunar valve open; A, aorta, with flaps of semilunar valve open; M, closed mitral valve; T, closed tricuspid valve.

Section of Heart Showing Valves

Section of heart at level of valves. Labels: P, pulmonary artery, with flaps of semilunar valve open;…

Semilunar valves of the heart. The blood received by the left ventricle through the auriculo-ventricular orifice is discharged into the main artery of the body, the aorta, through an opening which is guarded by these valves.

Semilunar Valves

Semilunar valves of the heart. The blood received by the left ventricle through the auriculo-ventricular…

The left ventricle and the commencement of the aorta laid open. Mpm, Mpl, the papillary muscles. From their upper ends are seen the cordoe tendineoe proceeding to the edges of the flaps of the mitral valve. The opening into the auricle lies between these flaps. At the beginning of the aorta are seen its three pouch-like semilunar valves.

Ventricle and Aorta Laid Open

The left ventricle and the commencement of the aorta laid open. Mpm, Mpl, the papillary muscles. From…