sulliale01 sulliale01

06-04-2016
Health

contestada

why is the cardiovascular system considered closed?

Respuesta :

06-04-2016

vertebrates have closed circulatory systems their blood flows through blood vessels like veins and arteries and they have a heart to push the blood around the body. thats why the human circulatory 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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