gas bladder

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 identical to the composition of air. May be one, two or three chambered. May be connected to the gut by a tube, the ductus pneumaticus (then called physostomous) or unconnected (then called physoclistous). May function as one or more of:- hydrostatic organ, sound producing organ, sound receptor, respiratory organ. Often lacking in bottom fishes. Sometimes called swim bladder or air bladder, less appropriate terms. An item in Chinese cuisine. Used to make isinglass, q.v

Dictionary of ichthyology. 2009.

Игры ⚽ Поможем написать курсовую

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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 — noun An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density. Syn: air bladder, fish maw, swim bladder …   Wiktionary

  • 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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