Question

The ends of chordae tendineae are attached to

• A. auriculoventricular valves and ventricular walls
• B. auriculoventricular valves and bundle of His
• C. auriculoventricular valves and atrial walls
• D. auriculoventricular valves and papillary muscles

Answer 1

The correct option is A auriculoventricular valves and ventricular walls

The bicuspid and tricuspid valves are also called auriculoventricular (AV) valves as they are present between the auricles and ventricles.
Chordae tendineae are the fibrous cords which are attached to the flaps of the left and right auriculoventricular valves. The other end of the chordae tendineae is attached to the walls of the ventricles through special muscles called papillary muscles.
These fibrous cords prevent the auriculoventricular (AV) valves from collapsing back into the atria during powerful ventricular contractions.
Columnae carneae are the muscular ridges or projections on the walls of ventricles. These structures are connected to the papillary muscles. These muscular projections divide the ventricular cavity into smaller spaces, called fissures.