Skeletal system
The human skeleton is made up of 206 bones making the human body a multifunctional structure. The skeletal system is composed of Bones, Joints, Cartilage, Tendons, and Ligaments. Human infants are born with about 270 bones, most of which ossifies as they grow up. The skeletons of adult males and females have some variation, primarily to accommodate childbirth. The female pelvis is flatter, more rounded and proportionally larger.
Bone: A rigid form of connective tissue that is part of the skeletal system of vertebrates and is composed principally of calcium phosphate and calcium carbonate. It also serves as a storage area for calcium, playing a large role in calcium balance in the blood. The ligament is a small band of dense, white, fibrous elastic tissue. Ligaments connect the ends of bones together in order to form a joint. They also assist in holding organs in place. Tendons are a tough, flexible and inelastic band of fibrous connective tissue that connects muscles to bones and is capable of withstanding tension. Tendons are similar to ligaments; both are made of collagen.