Chordae tendineae are thin collagen fibers that attach to which valve and to which muscular structures?

Chordae tendineae are thin collagen fibers that attach to which valve and to which muscular structures?

• A. Left AV valve and papillary muscles
• B. Right AV valve and papillary muscles
• C. Pulmonary valve and papillary muscles
• D. Aortic valve and papillary muscles

Answer: (B)

Chordae tendineae are thin collagen cords that anchor the leaflets of the atrioventricular valves to the papillary muscles in the ventricles. This setup keeps the valve cusps from bulging into the atria when the ventricle contracts. Specifically, the right AV valve (the tricuspid valve) is connected to papillary muscles by these chords. The left AV valve (the mitral valve) also uses chordae to papillary muscles, but the option that pairs chordae with the right AV valve is the best match. Semilunar valves (pulmonary and aortic) do not have chordae tendineae.

Chordae tendineae are thin collagen cords that anchor the leaflets of the atrioventricular valves to the papillary muscles in the ventricles. This setup keeps the valve cusps from bulging into the atria when the ventricle contracts. Specifically, the right AV valve (the tricuspid valve) is connected to papillary muscles by these chords. The left AV valve (the mitral valve) also uses chordae to papillary muscles, but the option that pairs chordae with the right AV valve is the best match. Semilunar valves (pulmonary and aortic) do not have chordae tendineae.