What is the main function of muscles?

The main function of muscles is to produce movement. Muscles work in conjunction with the skeletal system to enable various types of movements, including voluntary actions like walking and running as well as involuntary actions like heartbeat and digestion. When muscles contract, they pull on bones, causing movement at the joints. This ability to contract and create force is essential for many bodily functions and activities, making movement the primary role of muscles.

While muscles also play a supportive role in protecting organs and providing structure, their fundamental purpose is inherently tied to facilitating motion, which is critical for overall mobility and functionality of the body.