MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Make up muscular wall of heart
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Contract ventricles for pumping blood
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Control opening and closing of AV valves
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Control opening and closing of semilunar valves
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Detailed explanation-1: -The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
Detailed explanation-2: -The chordae tendineae, along with papillary muscle hold the flaps, or cusps, of each valve in place. When the ventricles contract, pressure gradients across the valves pull the cusps of the mitral and tricuspid valves shut.
Detailed explanation-3: -Papillary muscles are attached to the walls of the ventricles and to the AV valves forming bands called chordae tendinae. It functions to ensure proper functioning of the heart valves.