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  • Bones & Muscles for Parents


    Info on breaks, sprains, tears, and other problems that can affect the bones and muscles.

  • Your Muscles for Kids


    You have more than 600 muscles in your body! They do everything from pumping blood throughout your body to helping you lifting your heavy backpack. Find out more.

  • Bones, Muscles, and Joints for Teens


    Our bones, muscles, and joints form our musculoskeletal system and enable us to do everyday physical activities.

  • Bones, Muscles, and Joints for Parents


    Without bones, muscles, and joints, we couldn't stand, walk, run, or even sit. The musculoskeletal system supports our bodies, protects our organs from injury, and enables movement.

  • Quiz: Muscles for Kids


    Take this quiz about your muscular system.

  • Movie: Muscular System for Kids


    Watch this movie about the muscular system.

  • Muscular Dystrophy for Parents


    Muscular dystrophy is a disorder that weakens a person's muscles over time. People who have the disease can gradually lose the ability to do everyday tasks.

  • Hamstring Strain for Teens


    A hamstring strain happens when one or more of the muscles in the back of the leg gets stretched too far and starts to tear. Find out how to treat hamstring strains in this article for teens.

  • Word! Myalgia for Kids


    Myalgia is muscle pain — when muscles hurt because of an injury, overuse, or a medical condition.

  • Why Do Many Pregnant Women Pull Ligaments, Muscles, and Joints? for Parents


    Find out what the experts have to say.