Last Updated: Jul 16, 2019 The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person’s body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves.

Related to the function of movement is the muscular system’s second function: the maintenance of posture and body position. Muscles often contract to hold the body still or in a particular position rather than to cause movement.

Tibialis Anterior Muscle Tibialis Posterior Muscle Vastus Lateralis Muscle Vastus Medialis Muscle GENERAL Cross-Sections of Muscles of the Arm and Leg Muscle Cell Types Pronation/Supination Push/Pull Muscles Change Current View Angle Muscular System (Male View) Muscular System (Male Posterior View) Muscular System (Posterior View)