The right auricle (atrium) and ventricle of the heart opened, and a part of their right and anterior…
Right side of heart. Labels: A, cavity of right ventricle; B, superior vena cava; C, inferior vena cava;…
Section of heart at level of valves. Labels: P, pulmonary artery, with flaps of semilunar valve open;…
Section of the aorta, to show the action of the semilunar valve. A is intended to show the valves, represented…