The main function of the skeletal muscle system is to facilitate movement of the body by contracting in response to signals from the nervous system. Skeletal muscles are attached to bones via tendons and work in pairs: while one muscle contracts, the opposing muscle relaxes, enabling coordinated movement. Additionally, this system plays a role in maintaining posture, producing heat through muscle activity, and supporting joint stability. Overall, the skeletal muscle system is vital for daily activities, sports, and overall physical health.