Question

To maximise oxygen uptake fishes adopt a special technique with reference to flow of blood in their gills and direction of flow of water. What do we call it?

Answer 1

Answer:

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Explanation:

Fish gills use a design called 'countercurrent oxygen exchange' to maximize the amount of oxygen that their blood can pick up. ... Countercurrent oxygen exchange (shown in the figure above) means the blood flows through the gills in the opposite direction as the water flowing over the gills

Answer 2

Fish gills use a design called 'countercurrent oxygen exchange' to maximize the amount of oxygen that their blood can pick up. ... Countercurrent oxygen exchange (shown in the figure above) means the blood flows through the gills in the opposite direction as the water flowing over the gills.