All the bones in your body. (490) Sentence: The Skeletal System has five major functions: shape, organ protection, move attached muscles, blood cells (marrow) contained inside, and store calcium and phosphorus which strengthens bones.
Periosteum
A tough, tight-fitting membrane that covers a living bone's surface. (491) Sentence: Blood cells in the periosteum carry nutrients into the bone.
Cartilage
A smooth, slippery, thick layer of tissue that covers the ends of bones. (492) Sentence: Cartilage is flexible and acts as a shock-absorber for joints.
Joint
Any place where two or more bones come together. (493) Sentence: An example of a joint is an elbow.
Ligament
A tough band of tissue that holds bones together. (493) Sentence: Some joints, such as the knee, have more than one ligament.