What would be the consequences if we were to reverse the direction of water flow over the gills of a fish,moving water inward past the operculum,past the gills,the out the mouth?

Question

Quizplus · Accepted Answer

The normal direction of water flow over the gills of a fish is from the mouth, over the gills, and out through the operculum. This direction of flow maximizes oxygen uptake and carbon dioxide elimination. Reversing the direction of water flow would reduce the efficiency of gas exchange since the gill filaments and lamellae would not be exposed to oxygen-rich water for a sufficient amount of time.

What Would Be the Consequences If We Were to Reverse