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What characteristics can you observe in the gills that make them an efficient respiratory organ?
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What characteristics can you observe in the gills that make them an efficient respiratory organ?

User Vkreddy
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Answer:

Lots of folding = lots of surface area for diffusion.

Lots of vascularization.

Countercurrent exchange system.

Located off of the throat to help water get rammed down the throat in a single direction, across the gills

User Nitin Karande
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