How To Use Gill arch In A Sentence

Fish with jaws usually have five functional pairs of gill arches.
For example, the first gill arch in jawless fishes like lampreys (and in embryos of jawed vertebrates) corresponds to the jaws in those vertebrates that have them (that is, all modern vertebrates except lampreys and hagfishes). THE GREATEST SHOW ON EARTH
For example, the first gill arch in jawless fishes like lampreys (and in embryos of jawed vertebrates) corresponds to the jaws in those vertebrates that have them (that is, all modern vertebrates except lampreys and hagfishes). THE GREATEST SHOW ON EARTH
The nape lacks cirri, and the first gill arch attaches to the operculum, the latter characteristic distinguishing Tripterygiidae from Clinidae.
However, the gill arches seem to be jointed and they appear to be closely related to paired fin-folds on the anaspid model.

Another character that unites the chordates is the pharyngeal arches and pouches sometimes inaccurately called gill arches and gill slits. Haeckel had a point - The Panda's Thumb
Ichthyostega had seven digits in the feet and still retained some gill arch rudiments and fin rays in the tail.
These are formed from fused hyoid rays and articulate with the succeeding gill arches.