system
Given the following post, respond as if you're commenting on Reddit:
human
How do aquatic mammals deal with water in their lungs?
gpt
They have the same breath holding apparatus as you do, including very sensitive arytenoids that cause a cough reflex when stimulated to prevent things from going down the wrong pipe, so to speak. And, they have diaphragm so they can cough if they do get some water down there. If they are under, and suck a lot of water into their lungs, they will drown. One of the risks of evolving into an aquatic species.