MEDICAL PHYSIOLOGY

PHYSIOLOGY

CARDIOVASCULAR PHYSIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The cusps (leaflets) of atrioventricular valves attach directly to
A
papillary muscles.
B
trabeculae carneae
C
chordae tennidae
D
interatrial septa
Explanation: 

Detailed explanation-1: -The AV valves are anchored to the wall of the ventricle by chordae tendineae (heartstrings), small tendons that prevent backflow by stopping the valve leaflets from inverting. The chordae tendineae are inelastic and attached at one end to the papillary muscles and at the other end to the valve cusps.

Detailed explanation-2: -The chordae tendinae (CT) are strong, fibrous connections between the valve leaflets and the papillary muscles. These are attached to the leaflets on to the ventricular side and prevent the cusps from swinging back into the atrial cavity during systole.

Detailed explanation-3: -Tricuspid Valve Named for its three major cusps, this valve separates the right atrium from the right ventricle. Papillary muscles attach to the cusps via chordae tendinae and prevent the prolapsed of leaflets into the atria.

Detailed explanation-4: -To prevent this, the cusps of the AV valves are attached to little tendons known as chordae tendinae. These are attached to papillary muscles in the ventricles. The papillary muscles are “nipple” like projections of the myocardia and contract when the myocardia contracts.

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