Preferred Label : swim bladder;
Uberon definition : A thin membranous, sometimes alveolated sac in the dorsal portion of the abdominal
cavity. 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).;
Uberon synonym : gas bladder; swimbladder;
Uberon related term : fish maw; air bladder;
Uberon Function note : May function as one or more of: hydrostatic organ, sound producing organ, sound receptor,
respiratory organ;
Uberon Homology note : Lungs had already developed as paired ventral pockets from the intestine in the ancestor
of Osteognathostomata. (...) In actinopterygian fishes, apart from Cladistia, the
ventral intestinal pocket migrates dorsally and becomes the swim-bladder, a mainly
hydrostatical organ (reference 1); Comparative transcriptome analyses indicate molecular
homology of zebrafish swimbladder and Mammalian lung (reference 2).[well established][VHOG];
Uberon Taxon note : Found in Actinopterygii. Often lacking in bottom fishes;
Origin ID : 0006860;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
- develops from
- has part
A thin membranous, sometimes alveolated sac in the dorsal portion of the abdominal
cavity. 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).
