When did humans develop umbilical cords in the womb?

[PRBot.Com]

At what point on the evolutionary ladder did humans develop ambilical cords in the woumb?

Are there other species which have ambilical cords?

What is the explanation for lack of ambilical cords in other species and why we need it during the fetus development.

This is an area of science I never had the time to study. Are there any books on this very subject?

 

[tribdog]

I think I'm in love. Can I just follow you around and listen to you speak all day? You fascinate me. I just want to cut you up into little bitty pieces and watch your brain work it's magic. I'll bet you asked this question because you don't have a belly button right? no "ambilical" cords for you. You are new and unique.

 

[PRBot.Com]

Quit smoking that ****.

 

[tribdog]

and pass it back? I've been clean for years. Now I know why. I need a clear mind to appreciate just how special you are.

 

[Evo]

Uhm PRBot, virtually all mammals have Umbilical cords.

 

[dekoi]

What's happening here...?

Tribdog, you are just the joy in everyone's eyes arent you.


All mammals have cords. Do they not?

 

[Evo]

What's happening here...?

Tribdog, you are just the joy in everyone's eyes arent you.


All mammals have cords. Do they not?

I can only think of two mammals that are exceptions, the duck billed platypus and the spiny anteater which are egg bearing exceptions.

 

[Tsu]

Is this thread on Candid Camera?

 

[tribdog]

no the camera is down in the alternative energy post.

 

[Evo]

no the camera is down in the alternative energy post.

Yeah, I think we've had enough of this nonsense.