raquelyanez8885 raquelyanez8885
  • 06-10-2018
  • Biology
contestada

Why is the human cardiovascular system considered closed?

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nap14hockey
nap14hockey nap14hockey
  • 06-10-2018
The blood circulates, so blood is reused constantly. There's no break in the circle, so it is a closed system
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cburnes93
cburnes93 cburnes93
  • 16-10-2019

Answer:

There are no holes for blood to enter or leave the system

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