The problem is the nostrils.if it was just an indentation into the lungs, it’s one hole: digestive tract.
The nostrils divide the breathing passage into two, then join up again. From the air to the lungs is an indentation, but does the tissue separating the nostrils create two separate complete topographic holes?
Same for the ears; where do they join in on this system? Idfk, I’m not a doctor or a topologist
My point was that the discussion is silly/ absurd/ meaningless. Yet here I am… Caught in it.
So… Ears. Those have a membrane (so the air pressure inside transmits the sound to small bones)… I was considering that given a (healthy) membrane the hole is just a cavity. Bt then, the other side does have air. No idea how does it go in and out. But scuba or free divers do compensate the pressure on the other side of the membrane when descending… So the air in there goes in and out of the body in seconds. Might be connected to… Nostrils? Haha. My best guesstimate.
Vaginas, milk ducts, pores, etc in a topological sense, are not holes, just dents, like the recepticle part of a cup with a handle.
I mentioned noses and ears before deleting them, because the ENT region is really complicated for a non topologist/biologist to be able to tell if they can be interpreted as holes or not. Luckily for me in this discussion the system is identical for men and women.
Wait, the tear ducts count… but the eyesocket itself doesn’t?
Huh.
I would have intuitively thought the hole the optic nerve goes through counts, but I guess thats not really a uh, topologically true hole, as its mostly just a void in your skull.
Different numbers of holes though, gotta take homeomorphism into account.
I don’t think women have a different number holes topographically speaking.
The topologist can’t tell his coffee cup from his doughnut.
Generally, biologically speaking:
Men have a urethra and an anus.
Women have a urethra, and anus, and a vagina.
Presumably, discounting mutations, birth defects, serious injuries, etc, most people have the same number of uh… head/face holes.
…
Allowing for rarer cases:
Also… intersex people exist… there have been at least a few recorded instances of duplicate and/or forking dongs…
And I guess we could also consider varying kinds of conjoined twins.
…
Also also, we could argue about whether milk producing mammaries constitute a topological ‘hole’.
I think their point was that the hole has to go all the way though for it to count topologically
The vagina ends at the uterus, and milk ducts don’t go all the way through either
turns out it’s seven.
https://lemmy.world/post/33569021/18477275
https://youtu.be/egEraZP9yXQ?t=1037
100% correct, thank you.
Urethra doesn’t go anywhere either except for bladder, then nephrons (kidneys)…
Something similar applies to ears, right? And nose… But,
Also, what about the pores in my skin? :O
The problem is the nostrils.if it was just an indentation into the lungs, it’s one hole: digestive tract.
The nostrils divide the breathing passage into two, then join up again. From the air to the lungs is an indentation, but does the tissue separating the nostrils create two separate complete topographic holes?
Same for the ears; where do they join in on this system? Idfk, I’m not a doctor or a topologist
Ah, you got me on the nostrils. Alright…
My point was that the discussion is silly/ absurd/ meaningless. Yet here I am… Caught in it.
So… Ears. Those have a membrane (so the air pressure inside transmits the sound to small bones)… I was considering that given a (healthy) membrane the hole is just a cavity. Bt then, the other side does have air. No idea how does it go in and out. But scuba or free divers do compensate the pressure on the other side of the membrane when descending… So the air in there goes in and out of the body in seconds. Might be connected to… Nostrils? Haha. My best guesstimate.
Fuck this game xD
turns out it’s seven.
https://lemmy.world/post/33569021/18477275
https://youtu.be/egEraZP9yXQ?t=1037
https://en.wikipedia.org/wiki/Homeomorphism
Vaginas, milk ducts, pores, etc in a topological sense, are not holes, just dents, like the recepticle part of a cup with a handle.
I mentioned noses and ears before deleting them, because the ENT region is really complicated for a non topologist/biologist to be able to tell if they can be interpreted as holes or not. Luckily for me in this discussion the system is identical for men and women.
Derp.
Looks like I need to complexify the manifolds of my own brain, haha!
turns out it’s seven.
https://lemmy.world/post/33569021/18477275
https://youtu.be/egEraZP9yXQ?t=1037
Wait, the tear ducts count… but the eyesocket itself doesn’t?
Huh.
I would have intuitively thought the hole the optic nerve goes through counts, but I guess thats not really a uh, topologically true hole, as its mostly just a void in your skull.