does it serve a purpose for us to still have them aside from the obvious? i mean after birth. what about for animals *not* having them once they’re born? i was wondering specifically about rats and puppies. i’ve had both as babies and they all had a little black spot for a week or two, then it disappeared for good. when the rats were still pink with no fur i actually saw the black spot dissipate over time within like a week and a half or so
In: Biology
All placental mammals have belly buttons. Some are very small scars, some are large, but no placental mammal avoids cord attachment.
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