Disclaimer: I’m assuming this question can be tagged multiple flairs, but biology might be the most fitting, forgive me if im wrong.
I had a random shower thought today, I remember learning about fish and how they breathe, but I dont remember the details. Do they inhale water (H2O) and then take the Oxygen, as a result exhaling 2 Hydrogen? Do fish always exhale air bubbles? I used to own some and I dont remember them doing that unless they went to the surface for a short period of time. I also assume they breathe and drink like we do, or do they only ‘drink’ water when they consume their food since its also saturated with water?
In: Biology
Oxygen is dissolved in water, fish are able to separate it from the water using diffusion and [countercurrent exchange](https://upload.wikimedia.org/wikipedia/commons/0/04/Comparison_of_con-_and_counter-current_flow_exchange.jpg) in their gills.
The oxygen naturally wants to spread out, fish gills run low oxygen blood through counter to the flow of water allowing oxygen to move into their blood.
Latest Answers