How do skeletal muscles and bones work together to create movement?

Skeletal muscles and bones work together as a mechanical system to produce movement, primarily by acting as levers where bones serve as the rigid segments and joints act as the fulcrums.123

The process functions through the following key mechanisms:

• Force Transmission: Muscles are attached to bones by tendons, which are strong, fibrous connective tissues. When a muscle contracts, it generates mechanical force that is transmitted through these tendons to the bones, causing them to move at the joint.4
• Antagonistic Pairs: Because muscles can only pull (contract) and not push, they typically work in antagonistic pairs. For example, one muscle may flex a joint while its partner extends it. This coordination allows for controlled movement in different directions.1
• Neurological Control: Movement is initiated by the nervous system, which sends electrical signals to muscles via the neuromuscular junction. The brain coordinates these signals to ensure muscles act in groups to achieve precise posture and motion.25
• Leverage: The arrangement of muscles and bones functions like a lever, allowing the body to amplify force or speed depending on the muscle's attachment point and the type of joint involved.13