goldenlover1225
goldenlover1225 goldenlover1225
  • 23-12-2020
  • Biology
contestada

The first heart sound is made by

blood moving to the atria
blood moving to the ventricles
opening of the valve between the atria and the ventricles
closing of the valve between the atria and the ventricles

Relax

Respuesta :

7hqdnzaw5s 7hqdnzaw5s
  • 24-12-2020
Closure of the valve (mitral valve and tricuspid valve)
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