GENERAL ANATOMY
ANATOMY OF THE HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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structures on the cardiac wall to which the chordae tendinae are attached
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valvular restraints that prevent the atrioventricular valve cusps from being forced back into the atria
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large vein that empties blood into the lower part of the right atrium
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thin covering on surface of the heart
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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 connect the atrioventricular valves (tricuspid and mitral), to the papillary muscles within the ventricles.
Detailed explanation-3: -The papillary muscles of the heart are pillar-like muscles seen within the cavity of the ventricles, attached to their walls.
Detailed explanation-4: -The papillary muscles attach to the tricuspid valve leaflets by tendinous cords.
Detailed explanation-5: -There are 5 papillary muscles in the heart originating from the ventricular walls. These muscles attach to the tricuspid and mitral valve leaflets via the chordae tendineae and functionally prevent regurgitation of ventricular blood via tensile strength by preventing prolapse or inversion of the valves during systole.