In a labelled heart schematic, L lies between the left atrium and left ventricle, M lies where blood leaves the left ventricle, N lies between the right atrium and right ventricle, and P lies where blood leaves the right ventricle. Which labels identify the semilunar valves?

A heart diagram uses arrow A for the valve at the entrance to the artery that forms the aortic arch. Arrow B points to the valve between the right atrium and right ventricle. Which identification is correct?

A heart image has been rotated, so page position cannot be used to identify the sides. Label R points to the valve between the chamber receiving pulmonary veins and the ventricle with the thickest muscular wall. Which valve is R?

A flow diagram through the right side of a mammalian heart shows: vena cava → right atrium → valve T → right ventricle → valve U → pulmonary artery. How should T and U be identified?

On a transparent heart overlay, label K points to pocket-shaped cusps with no chordae tendineae. They are located at the base of the vessel arising from the left ventricle and supplying the systemic circulation. What does K identify?

In a sectional heart drawing, Y points to cusps attached to chordae tendineae between an atrium and a ventricle. Z points to pocket-shaped cusps without chordae at the opening from a ventricle into an artery. Which classification is correct?

Examine the labelled longitudinal section of the mammalian heart. Which pair of labels marks the atrioventricular valves?

The image shows a superior view of four valve openings after the atria and major vessels have been cut away. Which label identifies the pulmonary semilunar valve?

Study the labelled photograph-style image of a dissected mammalian heart. Which label identifies the bicuspid (mitral) valve?