hydrostatic skeleton

a fluid-filled cavity that surrounds the soft bodies of certain invertebrates such as jellyfish

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  • Hydrostatic skeleton — A hydrostatic skeleton or hydroskeleton is a structure found in many cold blooded organisms and soft bodied animals consisting of a fluid filled cavity, the coelom, surrounded by muscles. The pressure of the fluid and action of the surrounding… …   Wikipedia

  • skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …   Universalium

  • skeleton — 1. noun a) The system that provides support to an organism, internal and made up of bones and cartilage in vertebrates, external in some other animals. At the foot of a pretty big pine, and involved in a green creeper, which had even partly… …   Wiktionary

  • muscle — muscleless, adj. muscly, adj. /mus euhl/, n., v., muscled, muscling, adj. n. 1. a tissue composed of cells or fibers, the contraction of which produces movement in the body. 2. an organ, composed of muscle tissue, that contracts to produce a… …   Universalium

  • cnidarian — /nuy dair ee euhn/, n. 1. any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a… …   Universalium

  • locomotion — /loh keuh moh sheuhn/, n. the act or power of moving from place to place. [1640 50; see LOCOMOTIVE, MOTION] * * * Any of various animal movements that result in progression from one place to another. Locomotion is classified as either… …   Universalium

  • Musculoskeletal system — The musculoskeletal system (also known as the locomotor system) is an organ system that gives animals the ability to physically move using the muscles and skeletal system. The musculoskeletal system provides form, stability, and movement to the… …   Wikipedia

  • Muscular hydrostat — The tongue is a muscular hydrostat. A muscular hydrostat is a biological structure found in animals. It is used to manipulate items (including food) or to move its host about and consists mainly of muscles with no skeletal support. It performs… …   Wikipedia

  • Onychophora — Temporal range: 40–0 Ma …   Wikipedia

  • Cnidaria — Temporal range: 580–0 Ma …   Wikipedia

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