Gill
Videos
A gill is a specialized respiratory organ that many aquatic animals use for aquatic gas exchange, i.e. to extract dissolved oxygen from water and to excrete carbon dioxide. Branchia is the zoologists'
The red gills of this common carp are visibly exposed as a result of a gill flap birth defect.
Freshwater fish gills magnified 400 times
The red gills inside a detached tuna head (viewed from behind)
An alpine newt larva showing the external gills, which flare just behind the head
Fish gill
Videos
Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills on both sides of the pharynx. Gills possess tissues resembling short th
Gill arches bearing gills in a pike. Gills allow fish to breathe underwater.
Respiratory mechanism in bony fish The fish draws oxygen-rich water in through the mouth (left). It then pumps it over gills so oxygen enters the bloodstream, and allows oxygen-depleted water to exit through the gill slits (right)
Tuna gills inside the head. The head is oriented snout-down with the view looking towards the mouth.