Just to entertain you: An octopus has 3 hearts, an earthworm has neither heart nor lung.
Learning mutiple languages: this word means stomachs, close to Hungarian for the name of that nationality and then it's close to donkey in Romanian.
This whole time I thought it was just a myth that they had 4 stomachs, but here I find it's legit. What a world.
And is this kind of animal (a ruminant, derived from or related to the first stomach's name) called våmmaren or something like this (våmm-)? I found no entry for Swedish on the "read in another language" menu for "Ruminant" on Wikipedia in English...
Nope! A ruminant is an idisslare in Swedish. :) Its literal meaning was originally probably something like "whirling-eater", but both parts - id- and issla - have transformed completely in other Swedish words.