The document discusses the human skeleton and its functions. It explains that the skeleton helps us move, supports our body, and protects internal organs. It notes there are over 200 bones in the body, including 26 vertebrae in the backbone. Ribs form a cage to protect organs like the heart and lungs. The skull protects the brain. Bones in the arms, legs, hands, and feet help with movement and balance. Taking care of bones through diet, exercise, and safety gear helps make them strong.