• sroos@lemmy.world
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      14 小时前

      Well, there’s the one obvious one - mouth through to the anus, there may be more openings to that hole, but I don’t believe any of them go all the way through.

      • Ms. ArmoredThirteen@lemmy.zip
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        14 小时前

        That changes the topology though. It does go all the way through a section which prevents it from reshaping into a straw/donut

        • sroos@lemmy.world
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          13 小时前

          They go through the same hole as the mouth in the end, though. At least a part of them…

          I think I said in another comment that I’m not an actual expert on this matter. So there may well be more holes in this theory, and person.

          • thebestaquaman@lemmy.world
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            9 小时前

            They go through the same hole as the mouth in the end, though.

            Yes, but they’re distinct openings, which means we’re not topologically equivalent to a doughnut when you take them into account. Topological equivalence implies that you can transform one object into another without changing the number of openings. Classic example is a doughnut and a coffee mug (the handle of a coffee mug is the opening). A human would be equivalent to a doughnut with two holes poked through the side into the middle.