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Entwistle · 56-60, M
I remember reading (not sure it's true mind) that when a human foetus is developing that the anus develops first and then the mouth.
newjaninev2 · 56-60, F
@Entwistle Your recollection is accurate. In deuterostomes (broadly speaking, most vertebrates) the anus develops before the mouth develops.
On the other hand, protostomes (worms, insects, etc) do it the other way around.
On the other hand, protostomes (worms, insects, etc) do it the other way around.