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Answer – B. (Return blood to the lungs)
The function that capillaries serve in the cardiovascular system is to return blood to the lungs. The capillaries beds are the area where the excess carbondioxide produced by the cells are exchanged with oxygen. The deoxygenated blood is then transported by the capillaries through the circulatory system back to the lungs for reoxygenation
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Answer:Exercise helps you mentally and physically :) so start exercising
Explanation:
The correct answer is D. Your muscles are burning. If you are experiencing any of the other 3 choices, either you probably have asthma, or you just held your breath during sprints.
The lens is a separate part of the eye. Rods, cones and fovea are all in the retina.
