Question

first sounds of heart'​

Answer 1

Answer:

the first heart sound is LUB which is associated with the closure of the tricuspid and bicuspid valves whereas the second heart beat DUB is associated eith the closure of semilunar valves.

Answer 2

Here's ûr answèr ↓↓↓↓↓

Answer:

First sound of the heart is called LUBB at the closing of tricuspid and bicuspid of valve.

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