
"Hi, Billy Mays here...." No no! Don't change the channel.
"Billy Mays here to teach you about a revolutionary field of developmental biology that Anonymouse couldn't possbily study without getting a boost in the post count as well. I get so excited everytime I teach this!"
Gastrulation.....
def - the process of cell movements where the blastula is rearranged in preparation for making organs.

This is an early Xenopus laevis gastrula. Notice the invaginated dorsal lip.
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