And each cusp looks kind of like a parachute, because it has tiny little strings, called chordae tendineae, coming off of it that tether the cusps to a small muscle called the papillary muscle.

每个尖瓣看起来就像一个降落伞，因为它有很小的弦，叫腱索；腱索将尖瓣连接在一块叫做乳头肌的小肌肉上。