Humans are Deuterostomes. Right?..

Human Anatomy, Physiology, and Medicine. Anything human!

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Siroggak
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Humans are Deuterostomes. Right?..

Post by Siroggak » Tue Aug 12, 2014 4:46 pm

Wiki says:
In deuterostomes (including humans), the original dent (blastopore) becomes the anus, while the gut eventually tunnels through the embryo until it reaches the other side, forming an opening that becomes the mouth.

But the thing is that, as I have found out, there is no archenteron in human embryo at all. In fact, there are primitive node/streak/groove.
Besides, that primitive groove is somehow connected to the yolk-sac by means of blastopore (again, wiki says).

So how did blastopore end up between yolk-sac and primitive groove?

And the initial question that bothered me: when and how does that secondary mouth (as the name "Deuterostome" proclaims) appear during the development?

Hope you will help.

P.S. Sorry for possible mistakes. I'm actually Ukrainian =)

aisann
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Post by aisann » Wed Sep 24, 2014 7:46 pm

I cannot answer you now but I think if you look at Langman Embryology it will help you
Have you checked it?

Siroggak
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Re: Humans are Deuterostomes. Right?..

Post by Siroggak » Mon Oct 20, 2014 1:56 pm

Yes, I read it but it didn't help
Sorry for long answering - I thought no one would ever look at this question.

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