Musculoskeletal system

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The musculoskeletal system (MSK) is an organ system that gives animals the ability to physically move, by using the muscles and skeletal system. Apart from locomotion, the skeleton also lends support and protects internal organs.

[edit] Solid musculoskeletal system

The human musculoskeletal system consist of the human skeleton, made by bones attached to other bones with joints, and skeletal muscle attached to the skeleton by tendons.

[edit] Hydrostatic musculoskeletal system

Among others, cnidarians and annelids, have a hydrostatic skeleton similar to a water-filled balloon, these animals can move by contracting the muscles surrounding the fluid-filled pouch, creating pressure within the pouch that causes movement. Animals such as earthworms use their hydrostatic skeletons to change their body shape as they move forward, from long and skinny to short and stumpy. Arthropoda have their muscles attached to an exoskeleton.