The other body system that plays a direct role in moving muscles is the nervous system.

Quick Scoop: Short Answer

Muscles move when they receive electrical signals from nerves, so the nervous system directly controls when and how muscles contract. The skeletal system also works closely with muscles by providing the bones that muscles pull on to create body movement, so together they form the musculoskeletal system.

How Muscles Actually Move

  • The nervous system sends electrical signals down motor neurons to muscle fibers at a special contact point called the neuromuscular junction.
  • At this junction, chemicals called neurotransmitters (like acetylcholine) are released, triggering the muscle fiber to contract and produce movement.

Teamwork of Body Systems in Movement

  • The muscular and skeletal systems form the musculoskeletal (or locomotor) system, which allows the body to move, maintain posture, and hold its shape.
  • The brain and wider nervous system coordinate these movements by processing information from the senses and muscles, then sending precise instructions to specific muscle groups.

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