Answer: A you are using a drug for no reason.
Explanation:
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Answer:Blood has three main functions: transport, protection and regulation. Blood transports the following substances: Gases, namely oxygen (O2) and carbon dioxide (CO2), between the lungs and rest of the body. Nutrients from the digestive tract and storage sites to the rest of the body.
Explanation:
List the five functions blood serves in the body.
C. Janine should increase the intensity or length of her exercise programs because it is more difficult to maintain high fitness levels as you age.
B is nota component of rhis