How the Body Works : The Growing Embryo

The Growing Embryo

The growing embryo is kept alive by the placenta, an organ formed from the embryonic tissue which connects it to the mother's uterus. There are five stages in the development of the placenta, as illustrated here. During the development of the placenta the embryo, protected by fluid in the amniotic sac, gains nourishment for the first few weeks from the yolk sac. Later the placenta, formed by projections of an embryonic membrane, the chorion, which penetrates the uterine wall, provides the embryo with food and oxygen. The blood vessels of the allantoic sac later become part of the umbilical cord.

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[bourneultimatum115]

I'm not sure if this has been answered already, but before this zygote reaches the endometrium, it draws it's nutrients from the cytoplasm contained within the secondary oocyte, this occurs during the approximately week long passage from fertilization to implantation

[Bennnjammin]

@cliftclan Where does it get nourishment before the placenta develops, then?

[cliftclan]

Not at all true -- the embryo NEVER gets nourishment from the yolk sac. Please beware.

[gulfland]

FOR AMAAAAAZING FACTS, just type in the box :

scientific facts in the Quran

the proof that Islam is the truth

[canadianchic112]

dang, chill

[eternalsunshine182]

0.0

*drools*

Interesting...

[ladyluva103]

wow that was a good waste of 40 seconds thanks a lot dizzo95 you worthless peice of shit