Anatomy of the heart - Heart valves

3 important questions on Anatomy of the heart - Heart valves

What is chordae tendinae?

Tiny white collagen cords to each AV valve flap. They anchor the cusps to the papillary muscles sticking out of the ventricular walls.

How does the flaps close?

Due to the intraventricular pressure, forcing blood against the valves

The semilunar (SL) valves

They guard the bases of the large arteries and prevent backflow.
1. Aortic valve
2. Pulmonary valve

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