• Thorry84@feddit.nl
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      5 months ago

      In mammals that live in the water the nippels are normally protected with a skin flap. The infant needs to push this flap aside in order to drink the milk from its mother. The flap closes to be water tight, to protect the nipples.

      For species that live in both the water and on land, it can be different. Sealions for example have retractable nipples. Just something to think about I guess.

  • BananaTrifleViolin@lemmy.world
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    5 months ago

    So yeah, all mammals have breasts. Mammal comes from mammary. Is this not taught in schools anymore?

    This was like primary school science for me when growing up - like 8-9 years old - and repeated on biology throughout highschool.

    Or is it interesting because generally people don’t post pictures of elephant breasts?