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Which of the following is a healthy blood pressure level? A. 120/95 B. 130/80 C. 110/75 D. 115/85
Weegy: C. 110/75 is a healthy blood pressure level. (More)
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Asked 9/6/2013 10:09:22 AM
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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 the lungs D. there are no holes for blood to enter or leave the system
Weegy: our circulatory system is considered a closed one because we have blood vessels that transport the blood throughout the body. the blood cells are confined within these vessels and could only flow in one direction. [ an open circulatory system is characterized by absence of blood vessels and the blood cells are not found within any closed area but instead, blood cells on an open circulatory system are scattered throughout the body. ] (More)
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Asked 9/6/2013 10:26:28 AM
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