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.
Urethra isn’t a hole though, it’s just a depression. Mouth and anus are the same hole.
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.
Oh no topology has branched out from sandwiches to anatomy