Biology, 25.08.2019 18:30, lilquongohard

The human cardiovascular system is considered closed because
a. blood is continuously circulated in the body.
b. blood provides nutrients to organs.
c. blood collects oxygen from the lungs
d. there are no holes for blood to enter or leave the system

Answers: 1

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The human cardiovascular system is considered closed because
a. blood is continuously circula...