Structural control in tissue development

Occurrence of defects begins a process of destruction of a crystal, its existence is, however, necessary for the crystal growth. In an analogous manner as in propagation of defects during crystallization, the growing of a tissue stress leads to buckling and undulation down to order of the cell diameter. It is shown that the structural control in a tissue development is accomplished by wave-like rearrangement of 5-7 dislocations. The oriented cell divisions as 5-7 climbing can be explained analogously.