Sentences with phrase «placenta evolved»
Doing so might even tell us about how the human placenta evolved.
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In central Africa, an unassuming little lizard has evolved a spectacular and oddly human feature of gestation: a complex placenta.
The placenta seems to have evolved from the chorion, a thin membrane that lines the inside of eggshells and helps embryonic reptiles and birds draw oxygen.
When animals evolved placentas to feed their young, it may have allowed them to be less picky about their sexual partners