raquelyanez8885 raquelyanez8885

06-10-2018
Biology

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Why is the human cardiovascular system considered closed?

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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

16-10-2019

Answer:

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

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