Humans, like all other vertebrates, are Deuterostomes.This means that the first major geometric change in the shape of your body as it developed was to transform, via a process called Gastrulation, from a hollow sphere of cells, into a cup-like shape

Humans, like all other vertebrates, are Deuterostomes.This means that the first major geometric change in the shape of your body as it developed was to transform, via a process called Gastrulation, from a hollow sphere of cells, into a cup-like shape

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from: http://stupidcumslut.tumblr.com/post/141697933742