Morphogenesis (from the Greek morphê shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. Morphogenesis is concerned with the shapes of tissues, organs and entire organisms and the positions of the various specialized cell types. Cell growth and differentiation can take place in cell culture or inside of tumor cell masses without the normal morphogenesis that is seen in an intact organism. The study of morphogenesis involves an attempt to understand the processes that control the organized spatial distribution of cells that arises during the embryonic development of an organism and that give rise to the characteristic forms of tissue, organ, and overall body anatomy. In the human embryo, the change from a cluster of nearly identical cell at the blastula stage to a post-gastrulation embryo with structured tissue and organ is controlled by the genetic "program" and can be modified by

Source: http://en.wikipedia.org/wiki/Morphogenetics
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