(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 12


Fig. 12. Schematic of proposed locations of putative O2 receptor cells in fish gills: gill rakers (R), lamellae (L), tips of filaments (FT) and centre of filament (F) (efferent filament artery). Note that all fish species contain putative O2 receptor cells in at least two of these proposed locations and variation between species seems to be related to hypoxia tolerance.