Question

multiple choice question
what are the chordae tendineae?
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tough fibrous cords that anchor the av valves to the papillary muscles
modified muscles cells that conduct impulse during contraction
the ear - like external appendages of the atria
bunches of muscles within the myocardium

Explanation:

Chordae tendineae are tough fibrous cords that connect the atrioventricular (AV) valves to the papillary muscles, preventing valve prolapse during ventricular contraction.

Answer:

Tough fibrous cords that anchor the AV valves to the papillary muscles