Gills extract oxygen from water and release carbon dioxide. Their structure maximizes surface area for efficient gas exchange through diffusion.

How Do Gills Work? | Function, Oxygen Uptake, & Fish - Britannica

Gills are specialized organs that allow many aquatic animals to extract dissolved oxygen from water and release carbon dioxide. They serve as the primary means of respiration for a vast array of organisms. This function is essential, as water contains significantly less oxygen than air, enabling diverse aquatic species to inhabit various watery environments across the globe. How Gills Work The ...

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Everyone knows fish have gills that let them breathe underwater, but how exactly do they work? Learn the fascinating answer right here in this guide!

Gills allow aquatic and semi-aquatic animals to breathe by absorbing tiny particles of dissolved oxygen from water and excreting carbon dioxide as a byproduct of respiration. In most species, they are composed of numerous tiny, thin tissues or folded, branch-like structures. Their folded design helps increase their surface area and respire more efficiently.