Explanation

The skeletal system consists primarily of bones and joints that form the body framework. Bones are hard structures made of calcium that provide shape and support. Joints are where two or more bones meet and allow movement.

Humans have 206 bones connected by various types of joints. Some joints like knees bend freely while others like skull bones do not move. Together, bones and joints give the body structure, protect organs, and enable movement.

Ligaments connect bones to bones and tendons connect muscles to bones, but they are technically part of connective tissue. Cartilage cushions joints and blood vessels supply bones, but these are not primary skeletal components. Muscles and nerves are separate body systems. Only bones and joints form the core skeletal structure.