Michael Sam Is Not a âDistractionâ Dave Cullen February 11, 2014. A few minutes later, I understand why it all feels like a round of deja vu. The Upper West Side Celebrates An Imaginary Israelâs Birthday Vered Kellner April 14, 2013. Much of the rest of the debate provided a sense of deja vu. Romney Puts Perry on Defensive Howard Kurtz September 12, 2011. Which is great for me, I don't want to do deja vu all over again.
Muscle. Definition. noun, plural: muscles'. An organ made up of muscle tissues, or the tissue itself, enabling contraction or tension in an animal body to effect movement or locomotion. Supplement. Muscles are a specialized body part that produces movement or locomotion in animals.
For other uses, see Muscle (disambiguation). Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion.