For 1. the answer is The muscular system is responsible for the movement of the human body. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found of the heart, digestive organs, and blood vessels.
Answer:
Their still growing, developing, and often play and hurt themselves in a way that adults don't.
Explanation:
You should warm up for 15 to 20 minutes before activity
Answer:
Gradually increase the laps the individual swims every couple of weeks.
Explanation:
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