where av-valves are present and it's function
natasha2145:
I will
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Answer:
first of all one should know about valves
Explanation:
valves are used to prevent flow in some direction,
the av valves are used to prevent the back flow of blood from ventricle to atrium during contraction,
see the structure of valve
it is like v shaped just separate the two lines in v a little bit
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