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A cast keeps a broken bone still so it can heal.

A cast keeps a broken bone still so it can heal.

A hard cast wraps around your arm or leg. It holds the bone in place while your body fixes it, like a helpful hug.

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More facts about At the Hospital

An x-ray takes a special picture of the bones inside you. An x-ray takes a special picture of the bones inside you. A thermometer checks if your body is too warm. A thermometer checks if your body is too warm. Sticky plasters, called band-aids, were invented in 1920. Sticky plasters, called band-aids, were invented in 1920. The very first ambulances were pulled by horses. The very first ambulances were pulled by horses.