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Where does gaseous exchange occur in bony fish?
Over the surface of gills with has 4 pairs of gill arches consisting of many gill filaments
What are gills protected by?
The operculum
How does gas exchange work?
1. Water enters through mouth and passes out through gills
2. Blood flows through lamellae in one direction and water flows over in opposite direction (counter current system)
What does lamellae contain?
Blood capillaries and thin surface layer of cells to speed up diffusion
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