gas bladder

gas bladder
An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density.

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  • Gas bladder — and thus to stay at the current water depth, ascend, or descend without having to waste energy in swimming. cite encyclopedia | title =Fish | encyclopedia =Microsoft Encarta Encyclopedia Deluxe 1999 | publisher =Microsoft | date =1999] The gas… …   Wikipedia

  • gas bladder — a thin membranous, sometimes alveolated sac in the dorsal portion of the abdominal cavity. Composed of three layers, the tunica externa, the submucosa or middle layer and the tunica interna, all q.v. Contains a varying mixture of gases, not… …   Dictionary of ichthyology

  • gas bladder. — See air bladder (def. 2). * * * …   Universalium

  • gas bladder. — See air bladder (def. 2) …   Useful english dictionary

  • extrinsic gas bladder muscles — muscles with one end inserting on the gas bladder and the other end inserting elsewhere, as opposed to intrinsic …   Dictionary of ichthyology

  • Bladder (disambiguation) — Bladder may refer to:* A bladder is a pouch or other flexible enclosure with waterproof or gasproof walls * Gas bladder, an internal organ that contributes to the ability of a fish to control its buoyancyIn Anatomy: *Urinary bladder, which… …   Wikipedia

  • gas gland — a structure with numerous blood vessels (retia mirabilia) in the gas bladder that secretes gases from the blood. Also called fascis mirabilis, red gland, red body …   Dictionary of ichthyology

  • Gas lighting — For other uses, see Gaslight (disambiguation). Gas lighting is production of artificial light from combustion of a gaseous fuel, including hydrogen, methane, carbon monoxide, propane, butane, acetylene, ethylene, or natural gas. Before… …   Wikipedia

  • Bladder — The organ that stores urine. The bladder is a hollow organ in the lower abdomen. The kidneys filter waste from the blood and produce urine, which enters the bladder through two tubes called ureters. Urine leaves the bladder through another tube,… …   Medical dictionary

  • bladder — bladderless, adj. bladderlike, adj. /blad euhr/, n. 1. Anat., Zool. a. a membranous sac or organ serving as a receptacle for a fluid or air. b. See urinary bladder. 2. Pathol. a vesicle, blister, cyst, etc., filled with fluid or air. 3. Bot. an… …   Universalium

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