Question

what are cordnae tendnae s

Answer 1

The conical like projections that hold the valves in position


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Answer 2

The inner wall of ventricles is rough due to presence of muscular ridges columnae carnae. These continue as papillary muscles, whose one end is attached to the ventricular wall and and the other end is connected to the cusps of AV valves by CHORDAE TENDINAE. These CHORDAE TENDINAE are collagenous and inelastic chords, one end of which is inserted in the papillary muscles and other end is connected to the flaps of AV valves.These are meant for preventing the pushing of flaps into atrium during ventricular contraction.