Biology, asked by huma517, 1 year ago

Which one is the first heart sound?
a)Lub during closure of semilunar valves
b)Lub during closure of atrioventricular valves
c)Dub during closure of atrioventricular valves
d)Dub during closure of semilunar valves

huma517: yes

Answers

Answered by nav9456
4

HEYAAA,,,,,,

OPTION B. IS CORRECT...

HOPES ITS HELPFUL...

huma517: this question was already answered
huma517: who deleted those answers...i had marked brainliest one of them
Answered by vampire002
3
b)Lub during closure of atrioventricular valves
vampire002: welcome
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