The skeletal system provides support and protection to the body by forming a framework that encloses and supports the internal organs.

The femur, also known as the thigh bone, is the longest and strongest bone in the human body.

Synovial joints are freely movable joints that allow for a wide range of motion. Hinge joints, ball-and-socket joints, and pivot joints are all types of synovial joints.

Tendons are tough, fibrous cords of connective tissue that connect muscles to bones. They transmit the force generated by muscles to the bones, allowing for movement.

The gluteus maximus is the largest muscle in the human body. It is located in the buttocks and is responsible for extending the hip and rotating the thigh.

There are three types of muscle contractions: isotonic contraction, isometric contraction, and eccentric contraction.

Ligaments are tough, fibrous cords of connective tissue that connect bones to bones. They provide stability to the joints and prevent excessive movement.

There are four types of bones: long bones, short bones, flat bones, and irregular bones.

Cartilage is a specialized connective tissue that provides support and cushioning to joints. It also helps to reduce friction between bones.

There are three types of joints: synovial joints, cartilaginous joints, and fibrous joints.

The muscular system has three main functions: to produce movement, to maintain posture, and to generate heat.

There are three types of muscles: skeletal muscle, smooth muscle, and cardiac muscle.

The nervous system has three main functions: to control and coordinate body functions, to receive and process sensory information, and to send signals to muscles and glands.

The nervous system consists of the brain, spinal cord, and nerves.

The endocrine system regulates body processes by releasing hormones into the bloodstream.