swim bladder

swim 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. Found in Actinopterygii. Often lacking in bottom fishes. Sometimes called swim bladder, also a less appropriate term. An item in Chinese cuisine. Used to make isinglass, q.v.)

Dictionary of ichthyology. 2009.

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  • swim bladder — n. a gas filled sac in the dorsal portion of the body cavity of most bony fishes, giving buoyancy to the body and used as an accessory, lunglike organ in lungfishes * * * ▪ fish anatomy also called  air bladder,         buoyancy organ possessed… …   Universalium

  • Swim bladder — Swim Swim, n. 1. The act of swimming; a gliding motion, like that of one swimming. B. Jonson. [1913 Webster] 2. The sound, or air bladder, of a fish. [1913 Webster] 3. A part of a stream much frequented by fish. [Eng.] [1913 Webster] {Swim… …   The Collaborative International Dictionary of English

  • swim bladder — n. a gas filled sac in the dorsal portion of the body cavity of most bony fishes, giving buoyancy to the body and used as an accessory, lunglike organ in lungfishes …   English World dictionary

  • swim bladder — swim′ blad der n. ich air bladder 2) • Etymology: 1830–40 …   From formal English to slang

  • swim bladder infection — an acute haemorrhagic viral infection with a rhabdovirus. Symptoms include loss of coordination and equilibrium, popeyes, swollen belly, inflamed and swollen vent, and oedema and haemorrhages of various organs, particularly the swim bladder …   Dictionary of ichthyology

  • swim bladder — /ˈswɪm blædə/ (say swim bladuh) noun → air bladder (def. 2) …  

  • swim bladder — noun Date: 1837 the air bladder of a fish …   New Collegiate Dictionary

  • swim bladder. — See air bladder (def. 2). [1830 40] * * * …   Universalium

  • swim bladder — noun an air filled sac near the spinal column in many fishes that helps maintain buoyancy • Syn: ↑air bladder, ↑float • Hypernyms: ↑sac …   Useful english dictionary

  • swim bladder. — See air bladder (def. 2). [1830 40] …   Useful english dictionary

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