Definition of Gill arches. Meaning of Gill arches. Synonyms of Gill arches

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Definition of Gill arches

Gill arches
Gill Gill, n. [Dan. gi[ae]lle, gelle; akin to Sw. g["a]l, Icel. gj["o]lnar gills; cf. AS. geagl, geahl, jaw.] 1. (Anat.) An organ for aquatic respiration; a branchia. Fishes perform respiration under water by the gills. --Ray. Note: Gills are usually lamellar or filamentous appendages, through which the blood circulates, and in which it is exposed to the action of the air contained in the water. In vertebrates they are appendages of the visceral arches on either side of the neck. In invertebrates they occupy various situations. 2. pl. (Bot.) The radiating, gill-shaped plates forming the under surface of a mushroom. 3. (Zo["o]l.) The fleshy flap that hangs below the beak of a fowl; a wattle. 4. The flesh under or about the chin. --Swift. 5. (Spinning) One of the combs of closely ranged steel pins which divide the ribbons of flax fiber or wool into fewer parallel filaments. [Prob. so called from F. aiguilles, needles. --Ure.] Gill arches, Gill bars. (Anat.) Same as Branchial arches. Gill clefts. (Anat.) Same as Branchial clefts. See under Branchial. Gill cover, Gill lid. See Operculum. Gill frame, or Gill head (Flax Manuf.), a spreader; a machine for subjecting flax to the action of gills. --Knight. Gill net, a flat net so suspended in the water that its meshes allow the heads of fish to pass, but catch in the gills when they seek to extricate themselves. Gill opening, or Gill slit (Anat.), an opening behind and below the head of most fishes, and some amphibians, by which the water from the gills is discharged. In most fishes there is a single opening on each side, but in the sharks and rays there are five, or more, on each side. Gill rakes, or Gill rakers (Anat.), horny filaments, or progresses, on the inside of the branchial arches of fishes, which help to prevent solid substances from being carried into gill cavities.

Meaning of Gill arches from wikipedia

- posterior arches (simply called branchial arches) support the gills. In amphibians and reptiles, many elements are lost including the gill arches, resulting...
- escaping. The gill arches of bony fish typically have no septum, so that the gills alone project from the arch, supported by individual gill rays. Some species...
- escaping. The gill arches of bony fish typically have no septum, so the gills alone project from the arch, supported by individual gill rays. Some species...
- many structures. In fish, the arches are known as the branchial arches, or gill arches. In the human embryo, the arches are first seen during the fourth...
- each gill arch. Rakers are widely varied in number, spacing, and form. By preventing food particles from exiting the spaces between the gill arches, they...
- Gill slits are individual openings to gills, i.e., multiple gill arches, which lack a single outer cover. Such gills are characteristic of cartilaginous...
- that jaws are homologous to the gill arches. In jawless fishes a series of gills opened behind the mouth, and these gills became supported by cartilaginous...
- arterioles of the third and fourth gill arches (which do not actually have gills) are shut, the second, fifth and sixth gill arch arterioles are open, the ductus...
- pharynx to the exterior. Each gill is supported by a cartilaginous or bony gill arch. The bony fish have three pairs of arches, cartilaginous fish have five...
- Cymothoidae. It enters fish through the gills. The female attaches to the tongue, while the male attaches to the gill arches beneath and behind the female. Females...