[ThePythonicCow]

mouth, anus

And the mouth and anus are not two holes, but two ends of one hole, the alimentary canal.

[Blue_Ridge_Mtn_Geek]

mouth, anus

And the mouth and anus are not two holes, but two ends of one hole, the alimentary canal.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
True, and so if you are correct about the Eustachian tubes (and ignoring the lungs and sinus cavity which may or may not add to the count), there is indeed only "one hole" in the topological sense. And, if I am correct about those 'holes in our ears' there are, how many? Still four in that case, I think. "But I could be wrong".

[Red Badger]

The alimentary canal? Isn't that in Upstate NY?...........

[JCEccles]

And the mouth and anus are not two holes, but two ends of one hole, the alimentary canal.

So a rabbit is a doughnut.

And a door is a jar.

Mathematics is fascinating.