danaya67 danaya67

Today at 2:11 AM
Health

Answered

Heart sounds are caused by
A
contraction of the heart muscle
B
relaxation of the heart muscle
С
closing of the heart valves
D
movement of blood through the body

Answer :

lizzyreeder0713 lizzyreeder0713

Today at 2:16 AM

Contraction of the heart muscle

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Lneely108 Lneely108

Today at 2:16 AM

It’s A

I hope this helps

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