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Which of the following is LEAST likely to be a major function of the cardiovascular system?
  1. Distribution of oxygen and nutrients to the cells
  2. Production of the hormones insulin and glucagon
  3. Removal of carbon dioxide and metabolic wastes from the cells
  4. Prevention of a serious blood loss after injury through a clotting mechanism
Explanation
Answer: B - The cardiovascular system is not directly involved with the production of insulin or glucagon; both hormones are produced by the pancreas. The cardiovascular system is perhaps best known for distributing oxygen and nutrients to the cells and removing carbon dioxide and wastes from them. However, the cardiovascular system also performs essential clotting functions, temperature regulation, and first line defense against infection.
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