Look up muscle in Wiktionary, the free dictionary.
A muscle is a contractile tissue in an animal's body used especially for movement composed of muscle or muscle tissue. In this sense it can refer to:
- Skeletal muscle, the voluntary muscle allowing conscious movement in vertebrates
- Smooth muscle, the muscle of the internal organs of vertebrates, and throughout many invertebrates
- Cardiac muscle, the specialized muscle of the heart
Muscle or Muscles or variation, may also refer to: