Body building: step one

26 Aug

All animals begin as a ball of cells and emerge as amazing sculptures.

The body-building process begins with gastrulation:  In most cases, an indentation in the cell ball produces an opening that will eventually become the anus.  Cells migrate to form the three basic layers of the body, and they establish the primary axes that determine the right/left and front/back sides of the animal.  Once they’ve been organized like little subgroups at a conference, interactions among appropriate cells initiate the process of organ creation.

In this video we can actually watch the gastrulation process unfolding in the blastula (cell ball) that will become a little white frog.

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