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:

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.