Skeletal and Muscular System
By 461267850, Updated
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That was a long run, my leg muscles are hurting!
Im gonna need to drink some water so I dont become dehydrated
My arms are so tired, its even hard to grab the water bottle. My muscles are so tired.
Your brain especially the nervous system tells your muscles to contract and stretch out when your are walking or running.
In order for your muscles to move they have to work with the bones that allow the muscles to allow you to walk or any activity
In order to grab the water bottle, the muscles get messages from the brain and tell the bones to move to grab the water bottle.
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