Female Kangaroos, Koalas, Wombats and Tasmanian devils all have 3 vaginas. The diagram below explains the complicated plumbing. This set-up is shared by all marsupials – the group of mammals that
raise their young in pouches. Koalas, wombats and Tasmanian devils all
share the three-vagina structure. The side ones carry sperm to the two
uteruses (and males marsupials often have two-pronged penises), while
the middle vagina sends the joey down to the outside world.
Note that the ureters, which carry urine from the kidneys to the
bladder, pass through the gaps between the three tubes. In placental
mammals, like us, the ureters develop in a different way, and don’t go
through the reproductive system. As we develop, the precursors to the
reproductive tubes eventually fuse into a single vagina. In marsupials,
this can’t happen.
Photo Credits :
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