The answer is How you think about exercise. Hope I could help! ^w^
Answer:
they have big effects; it usually affects cells, tissues, and systems other than the target cells
Explanation:
The blood going out from the arteries is full of oxgyen.It delievers that oxgyen to organs,therefore when it returns in the veins it contains carbon dioxide.
We need to pay attention to our health care, and what are you asking?
