Question

Describe the structure and function of the AV valves, chordae tendinae, and papillary muscles in the human/sheep heart.

Answer 1

ATRIO VENTRICULAR VALVES

                           The atrioventricular valves , are thin structures that are composed of endocardium and connective tissue They are located between atria and ventricles .When they are closed , it allows oxygen-depleted blood returning to the heart from the venae cavae to fill the right atrium.

CHORDAE TENDINEAE

                          The chordae tendineae are group of tough,tendinous strands in the heart.They are commonly known as the "strings of heart" due to its location and function . They are seen by connecting tricuspid and bicuspid valves via strings inorder to perform their duty. Functionally , the chordae tendineae play a vital role in holding the atrioventricular valves in place , while the heart is pumping blood.

PAPILLARY MUSCLES

                          The pappilary muscles are muscles located in the ventricles of the heart.Chordae tendineae is a part of these muscles. Because they attach to the cusps of the atrioventricular valves (also known as mitral and tricuspid valves) via chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).