Seudónimo Seudónimo
  • 13-06-2021
  • Biology
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can anyone help me plz​

can anyone help me plz class=

Respuesta :

smithy28
smithy28 smithy28
  • 13-06-2021

Answer:

2. Only ventricles contracts

Explanation:

Systole, period of contraction of the ventricles of the heart

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