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

Respuesta :

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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