Lessons/Quizzes only) The human cardiovascular system is considered closed because A. blood is continuously circulated in the body. B. blood provides nutrients to organs. blood collects oxygen from the

Lessons/Quizzes only)

The human cardiovascular system is considered closed because
A. blood is continuously circulated in the body.
B. blood provides nutrients to organs.
blood collects oxygen from the lungs
D. there are no holes for blood to enter or leave the system
C.
Please select the best answer from the choices provided.
0
A

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Lessons/Quizzes only) The human cardiovascular system is considered closed because A. blood is continuously circulated in the body. B. blood provides nutrients to organs. blood …

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