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RE: Tree of Life: The Fascinating Journey of Placental Evolution

in #science6 years ago (edited)

hi @mobbs you talked about plancenta designs and that they don't get rich flow of nutrients anywhere. You also said they depend on yolk sac. Can you please explain more about this?

Thank you!

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I don't consider a yolk sac as a 'flow' - by this I mean a persistent fresh supply being freshly generated, rather than a ready-made meal stored and slowly consumed, which naturally brings inherent limitations