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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Earth surface water has enough partial pressure of oxygen to keep you alive, and lungs have a much greater surface area than gills.
The diaphragm, however, is not strong enough to push water in and out of the lungs at the rate needed for gas exchange, so you still drown.
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