Briefly describe the importance of the skeltal, muscular, and nervous systems.

Well the skeletal system protects vital organs as well as support the body its kind of like the foundation of a building without it the building will crumble. The Muscular system is important as well because it gives the body shape and helps us to pick up things it is also important for it is a key factor to movement and mobility. Also the nervous system is very important because its what gives us touch and the ability to feel as well as send messages from the brain to the body.

Explanation:

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well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there