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Respiration in fishes, Biology
N IN FISHES -
Respiratory organs are gills. In elasmobranchi 5-7 pairs of gills present, spiracles present.
In Teleostomai 4 pairs gills present, covered by operculum. Respiration by gills is brachial respiration.
Each gill is made up of two rows of gill filaments that project from the pharyngeal wall into the gill chamber.
Each gill filament leave a series of thin, leaf like gill lamellae.
A gill lamellae contains a network of capilalries covered by a thin epithelium.
For brachial respiration water enters through mouth.
Posted Date: 10/1/2012 8:40:30 AM | Location : United States
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