The kid has down syndrome which can cause kids learning regular tasks at a later age. Don't quote me on this.<span />
To prevent injuries, because if you are running around and exercising, if you haven't warmed up, you could pull a muscle or injure yourself. Cool downs help calm your body down and lower your heart rate.
Its a slow process atlest for me start small then work ur way up
Answer:
The cells do not produce functional motor proteins in the flagella and cilia
