danaya67 danaya67

26-02-2021
Health

contestada

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

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lizzyreeder0713 lizzyreeder0713

26-02-2021

Contraction of the heart muscle

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Lneely108 Lneely108

26-02-2021

It’s A

I hope this helps

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