38. countercurrent flow provides an efficient means of exchange between the a. f

Question

38. countercurrent flow provides an efficient means of exchange between the a. filaments of fish gills and the surrounding water b. blood in the capillarities and adjacent tissue c. alveoli in the mammalian lungs and the adjacent capillarities d.tracheal systems and the spiracle of insects e.above all 38. countercurrent flow provides an efficient means of exchange between the a. filaments of fish gills and the surrounding water b. blood in the capillarities and adjacent tissue c. alveoli in the mammalian lungs and the adjacent capillarities d.tracheal systems and the spiracle of insects e.above all 38. countercurrent flow provides an efficient means of exchange between the a. filaments of fish gills and the surrounding water b. blood in the capillarities and adjacent tissue c. alveoli in the mammalian lungs and the adjacent capillarities d.tracheal systems and the spiracle of insects e.above all

Explanation / Answer

All of the above are the examples of contercurrent flow. Countercurrent flow is defined as exchange of some property between two opposite flowing bodies.So the correct answer here is (e).

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