Countercurrent flow in fish gills occurs when blood flows through the lamellae in the opposite direction to the flow of water over them.
In fish, countercurrent flow is where blood flows through the lamellae in one direction, and water flows over in opposite direction.
| Text | In fish, countercurrent flow is where blood flows through the lamellae in one direction, and water flows over in opposite direction |
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Tags: b1, bio, exchanging-substances
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