gill slit


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gill slit

(gĭl)
n.
1. One of several narrow external openings connecting with the pharynx, characteristic of sharks and related fishes, through which water passes to the exterior, thereby bathing the gills. Also called branchial cleft, gill cleft.
2. Embryology One of several rudimentary invaginations in the surface of the embryo, present during development of all air-breathing vertebrates and corresponding to the functional gill slits of aquatic species. Also called branchial cleft, branchial groove, pharyngeal cleft, pharyngeal groove.

gill slit

see GILL CLEFT.
References in periodicals archive ?
Answers: nouns: gill slits, cartilage, lateral lines, prey; adjectives: keen, shallow, endangered, extinct Students will choose and define two new terms in their own words.
But why should it have unmistakable gill slits unless its remote ancestors did respire with the aid of gills?
Cameron said: "Work from my lab has shown that enteropneusts filter feed using a pharynx perforated with gill slits, just like the invertebrate chordates.
Water escapes through gill slits, leaving behind the filtered food.
It's good-bye to fins and gill slits, welcome lungs and hair.
If a Great White shark swam down the High Street it would have less impact - and with a design incorporating gill slits down the sides it does a reasonable impression of that deadly predator.
The new fish species is about 25mm long and is thought to feed off larger fish by swimming into their gill slits and sucking their blood.