Are The Gills Of A Fish External Or Internal? Fishes have internal gills, formed as outgrowths from the pharynx wall and contained within gill slits. Water entering the mouth is pumped out through these slits and over the gills. Are gills external? Respiratory organs of vertebrates The gills are totally external in a few forms
Are Gills Of Bony Fishes Found? In bony fish, the gills lie in a branchial chamber covered by a bony operculum (branchia is an Ancient Greek word for gills). The great majority of bony fish species have five pairs of gills, although a few have lost some over the course of evolution. Where are gills
Are Gills In A Fish A Muscle? The gill filament adductor muscles contract twice during a normal respiratory cycle. First during the transition from the contraction to the expansion phase and for a second time at the end of the expansion phase. These two contractions serve different purposes. What is the structure of fish gills?