The musculoskeletal system is the network of bones, muscles, tendons, ligaments, and cartilage in the human body. It provides support, stability, and movement to the body. Bones are the hard, mineralized structures that form the framework of the body. They protect internal organs, provide attachment points for muscles, and store minerals such as calcium. Muscles are soft tissues that work together with bones to create movement. There are three types of muscle: skeletal, smooth, and cardiac. Skeletal muscle is attached to bones by tendons and is responsible for voluntary movement. Smooth muscle is found in internal organs and blood vessels and is responsible for involuntary movement. Cardiac muscle is found in the heart and is responsible for pumping blood.

Tendons are tough, fibrous connective tissues that attach muscles to bones. They transmit the force generated by muscles to bones, allowing movement. Ligaments are fibrous connective tissues that attach bones to other bones. They provide stability to joints and prevent excessive movement. Cartilage is a tough, flexible tissue that covers the ends of bones at joints. It provides a smooth surface for joint movement and acts as a shock absorber.

The musculoskeletal system is crucial for physical activity, as well as for maintaining posture and balance. It also plays a role in the production of blood cells and the storage and release of minerals such as calcium and phosphorus. Injuries and disorders of the musculoskeletal system can cause pain, loss of mobility, and other health problems.