Muy Anti-Bueno
I don't know what I'm talking about.Tuesday, September 19, 2006
From Human Biology:
During the development of the human body inside the womb, the mezzoderm excretes a chemical around the neural tube. Depending on the amount of the chemical they are exposed to, the cells become different kinds of nerve cells.
The chemical is called Sonic Hedgehog.
The chemical is called Sonic Hedgehog.
posted by Gwazz # 8:21 PM 
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