joint - the place where two bones meet like your knees, shoulders, elbows, hips, and wrists, calcium - a soft, white mineral that makes your teeth and bones strong and hard, cartilage - a tough, flexible material found inside your joints; ears and nose are made of it, bone marrow - a soft substance inside bones that is used to make blood cells, ligament - a band of tissue that connects bones to bones allowing us to move smoothly, skeleton - all the bones that protect your body and organs; it also gives you support and movement,

Skeletal System

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