Which system is primarily responsible for movement and support in the body?

• A. Musculoskeletal System
• B. Integumentary System
• C. Organ System
• D. Epidermis

Answer: (A)

Movement and support in the body come mainly from the musculoskeletal system, which includes bones, joints, and skeletal muscles. Bones form the framework that supports posture and protects organs; joints provide mobility; muscles generate the force that moves bones when they contract. This system also stores minerals and supports circulation of nutrients necessary for activity, and it works with the nervous system to coordinate movement. The integumentary system, including skin, hair, and nails, protects the body and helps regulate temperature, but it doesn’t provide the main structural support or generate movement. The epidermis is just the outer skin layer and has no role in movement. Describing the option as an “organ system” is too vague, since it doesn’t identify the specific system responsible for movement and support.