Your nostrils, eyes, and ears are also connected to the inner-outside part of your body via the sinuses. So we’re not doughnuts, we’re something much stranger with 8 holes all connected in the middle.
Urethra and vagina are pockets, not true holes, since they don’t go all the way through.
Seven or eight?
I got curious and asked the Sky Brain about this. It got a little “Clinton-esque.”
Urethra isn’t a hole though, it’s just a depression. Mouth and anus are the same hole.
Oh no topology has branched out from sandwiches to anatomy
Your nostrils, eyes, and ears are also connected to the inner-outside part of your body via the sinuses. So we’re not doughnuts, we’re something much stranger with 8 holes all connected in the middle.
Urethra and vagina are pockets, not true holes, since they don’t go all the way through.