The skeleton is the bony structure of the body. The skeleton consists of 260 bones. They vary in shape and size. The body is supported by skeleton. Functions of the skeleton is the protection, support and movement. The spine protects the bone marrow. The skull protects the brain. Bones connected by fibrous tissues. Bones are surrounded by muscles. Bones and muscles comprise the musculoskeletal system. Organic and inorganic substances make up the bone. Bones contains spongy substance. The skeleton is an important structure of the body.