Which body system would be most affected by an injury that prevents you from moving your arm?

Which body system would be most affected by an injury that prevents you from moving your arm?

• A. Muscular System
• B. Skeletal System
• C. Nervous System
• D. Circulatory System

Answer: (A)

Movement comes from muscles contracting to pull on bones at the joints. The muscles are the part of the body that actually generates the force to move the arm. If an injury stops you from moving, the most directly affected system is the muscular system, since it’s the muscles themselves that power the motion. The skeletal system provides the framework and joints, and the nervous system sends signals to make muscles contract, but the immediate issue causing the loss of movement is the muscle’s ability to contract. The circulatory system helps supply blood to muscles, but it doesn’t create movement.

Movement comes from muscles contracting to pull on bones at the joints. The muscles are the part of the body that actually generates the force to move the arm. If an injury stops you from moving, the most directly affected system is the muscular system, since it’s the muscles themselves that power the motion. The skeletal system provides the framework and joints, and the nervous system sends signals to make muscles contract, but the immediate issue causing the loss of movement is the muscle’s ability to contract. The circulatory system helps supply blood to muscles, but it doesn’t create movement.