What are the properties of muscles?

The methods of locomotion performed by animals vary with their habitats and the demand of the situation, but the main purpose is to search for food, shelter, mate, suitable breeding grounds, favourable climatic conditions, or to escape from enemies/predators. Muscle is a specialised tissue of mesodermal origin. About 40-50% of the body weight of a human adult is contributed by muscles.Muscles have special properties like excitability, contractility, extensibility and elasticity.