Why do we have to contract our throat when swallowing water? I mean it could just slide right down to our tummies.
In: 205
To add to what the others have said, there’s also the fact that just sliding would be effected by gravity. if your body just let it flow, you could only drink while upright. we are primates, many of our ancestors spent their lives in the trees, and therefore likely sideways a good chunk of the time, or even hanging upside down to drink from a river or whatever. just as well, as without this feature of our anatomy, we couldn’t explore space!
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