The adult human skeleton is made up of 206 bones. These include the bones of the skull, spine (vertebrae), ribs, arms and legs. Bones are made of connective tissue reinforced with calcium and specialised bone cells.

What are the 5 main parts of the skeletal system?

The musculoskeletal system is made up of the body's bones (the skeleton), muscles, cartilage, tendons, ligaments, joints, and other connective tissue that support and bind tissues and organs together. The skeleton serves as the main storage system for calcium and phosphorus.

What are the 4 main parts of the skeletal system?

The skeletal system is composed of four main fibrous and mineralized connective tissues : bones, ligaments, tendons, and joints.