ANSWER: Glasses for eyes also hearing Aids
Explanation:
I believe it is Fast-twitch muscle fibers. Slow-twitch fibers are used for people who exercise for a long period of time such as running, swimming, and cycling.
it pumps blood? but depending on which part of the heart it is located it could be oxygenated or deoxygenated blood
Answer:
Carbon dioxide
Explanation:
Because The heart pumps the oxygen to the muscles that are doing the exercise. When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide.
