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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 lungs. D. there are no holes for blood to enter or leave the system.
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 lungs. D. there are no holes for blood to enter or leave the system.
The circulatory system is system in the human body that provides a network through which our blood flows constantly.The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system. Correct answer: DIn the closed circulatory system the blood stays confined within the vessels and heart....
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