Which structure pulls the atrioventricular valves closed by tension from the papillary muscles?

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Study for the VetSkill Level 3 Diploma VN03 – Principles of Veterinary Nursing Care 1 Exam. Utilize comprehensive flashcards and multiple-choice questions, each paired with hints and explanations, to prepare effectively for your exam!

Multiple Choice

Which structure pulls the atrioventricular valves closed by tension from the papillary muscles?

Explanation:
Chordae tendineae are the string-like structures that tether the leaflets of the atrioventricular valves to the papillary muscles. When the ventricles contract, the papillary muscles also contract and pull on these chordae, creating tension that keeps the valve leaflets pinched shut and prevents them from bulging back into the atria. This tensioning mechanism is essential for one-way blood flow. The aorta and vena cava do not participate in this tethering process.

Chordae tendineae are the string-like structures that tether the leaflets of the atrioventricular valves to the papillary muscles. When the ventricles contract, the papillary muscles also contract and pull on these chordae, creating tension that keeps the valve leaflets pinched shut and prevents them from bulging back into the atria. This tensioning mechanism is essential for one-way blood flow. The aorta and vena cava do not participate in this tethering process.

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