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постељица

The oval spongy structure in the uterus from which the fetus derives its nourishment and oxygen. The placenta develops from the outer cell layer of the blastocyst, called the trophoblast.

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Dragan Zivanovic
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Settore/Dominio: Fisica Categoria: Fisica (generale)

теорија Великог праска

Current model of galactic evolution in which the universe was created from an intense and brilliant explosion from a primeval fireball.