2. describe how the nervous, skeletal and muscular system work together when you do exercise such as running, swimming or biking?

They work together by the nervous system sending signals to the skeletal and the muscular helps the bones move

Explanation:

It is false that all types of exercise are appropriate at any age. Older people generally cannot do the same exercises that teenagers can, simply because their bodies can no longer take such risks and move as flexibly as they used to when they were younger. Thus, there are exercises which are appropriate for older people, others which only teens should use, some for babies, some for middle-aged people, it all depends on the age.