embryonic development in a chick

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Can anyone please help me out..I just cant understand this gastrulation stage ...my book's too confusing..can't understand how the hypoblast forms the yolk sack? and what exactly are area pelucidia and area opaca? cant understand primitive streak as well as hensen node....arghh...and google is not helping! any recommendations for a book or website ?


thanks in adv....

S.Naqvi

[tianlai]

Firstly, you need twenty fertilized eggs.
Secondly, you need a incubator that keeps at 37.8℃.
Eventually, every day you open an egg and take the photo of embryo.
I guess at the nineteenth day the egg is going to be opened from inside by itself.

[MichaelXY]

Firstly, you need twenty fertilized eggs.
Secondly, you need a incubator that keeps at 37.8℃.
Eventually, every day you open an egg and take the photo of embryo.
I guess at the nineteenth day the egg is going to be opened from inside by itself.

I think that is a bit much. Besides, I think it is 21 days. Here are a few links.

http://msucares.com/poultry/reproductio ... mbryo.html
http://www.rit.edu/~nlwsbi/EMBRYOS.HTM
http://lancaster.unl.edu/4h/Embryology/EmbryoPhotos.htm
http://chickscope.beckman.uiuc.edu/reso ... pment.html

That may not have enough detailed info, but give it a crack.

[cracked_doc]

thanks...I guess the net doesn't have detailed info on this one....but anyways that was helpful.