The four generalized phases in the development of an animal are: (i) organization of the body along axes, (ii) organization of the body into several smaller regions, (iii) organization of cells in ways that produce body parts and (iv) cell differentiation, where cells change morphologies and become specialized.
The 4 critical techniques through which a multicellular organism is made: mobileular/cells proliferation, mobileular specialization, mobileular interaction, and mobileular movement. In a growing embryo, most of these techniques are going on at once, in a kaleidoscopic range of various methods in unique elements of the organism.
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