Humans absorb oxygen from air in the lungs, fine.
If you put water in the lungs the dissolved oxygen in the water somehow(?) doesn’t get absorbed, fine.
But, somehow(?) fish can absorb oxygen from water.
OK? How come human lungs can’t absorb oxygen from water but fish gills can absorb oxygen from water?
It’s literally just diffusion?
**EDIT: This thread is cancer. I will try to find the answer somewhere else. Turning off replies.**
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