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yanalaym [24]
3 years ago
14

The human cardiovascular system is considered closed because __________.

Biology
2 answers:
sveta [45]3 years ago
5 0
<span>The human cardiovascular system is considered closed because D. there are no holes for blood to enter or leave the system. Given that the blood doesn't really flow out of your body freely, it means that your system is closed. Otherwise, it would leave your body from every orifice, or even from your own skin through the pores. </span>
Temka [501]3 years ago
5 0

Answer:

its d lol

Explanation:

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