This card describes additional adaptations of fish gills, including overlapping gill filaments to slow water flow and the counter-current system to maximize gas exchange.
Tato karta popisuje dodatečné adaptace žaber ryb, včetně překrývání žaberních vláken pro zpomalení průtoku vody a protiproudu pro maximalizaci výměny plynů.
| Front | Extra adaptations of gills 3.1.1(f) |
|---|---|
| Back | - tips of adjacent gill filaments overlap, inc resistance to flow of water over gill surfaces (slows water flow so more time for gaseous exchange) - blood in gill filaments and water moving over gills are in opp directions (counter current system), ensures Steeper conc gradients maintained (so more gas exchange) |
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