gas bladder

(redirected from Swimbladder)
Also found in: Medical.

gas bladder

Mentioned in ?
References in classic literature ?
The illustration of the swimbladder in fishes is a good one, because it shows us clearly the highly important fact that an organ originally constructed for one purpose, namely flotation, may be converted into one for a wholly different purpose, namely respiration.
I can, indeed, hardly doubt that all vertebrate animals having true lungs have descended by ordinary generation from an ancient prototype, of which we know nothing, furnished with a floating apparatus or swimbladder.
Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiae that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.
The study found that the muscle fibers surrounding the fish's swimbladder can sustain the high rates of contraction - up to 100 times per second - that are needed to produce the animal's distinctive mating call.
Shaun AFISH have an organ called the swimbladder, which they use to control their position in the water.
In type B, the last two abdominal vertebrae have a bridge joining the haemal arches across the midline, forming a haemal canal; the first caudal vertebra has broad haemal arches with a small basal haemal canal and a larger secondary canal distal to this, which forms a posteriorly tapering funnel and embraces the posterior end of the swimbladder.
Sciaenids, on average, are highly acoustic, both producing and receiving sonic vibrations via resonance through the swimbladder (Nelson 2006).
The effects of metals on swimbladder inflation of common carp (Cyprinus carpio L.
Kinetics of the inflammatory reaction induced by carrageenin in the swimbladder of Oreochromis niloticus (Nile tilapia).