What primary function do skeletal muscles serve in the body?

• A. Transport molecules
• B. Support the body and allow voluntary movement
• C. Bring oxygen into the body
• D. Defend against pathogens

Answer: (B)

Skeletal muscles play a crucial role in the body primarily by supporting the musculoskeletal system and enabling voluntary movement. They are attached to bones via tendons and are responsible for the movement of the skeleton. When these muscles contract, they facilitate movements such as walking, running, and other physical activities, allowing an individual to maintain posture and perform various tasks.

In addition to movement, skeletal muscles provide structural support and stability for the body, helping to maintain balance and positioning. This voluntary control over the muscles is distinct from smooth and cardiac muscles, which operate involuntarily. Thus, the primary function of skeletal muscles encompasses both movement and support, aligning directly with the selected correct answer. The other options, while important in their own contexts, do not accurately reflect the primary role of skeletal muscles in the body.