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плацента

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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Settore/Dominio: Persone Categoria: Sportivi

Флојд Мејведер

Born Floyd Sinclair on February 24, 1977, an American professional boxer. He is a five-division world champion, where he won nine world titles in five ...