Abstract
Stratified epithelia are made up of several layers of cells, which act as a protective barrier for the organ they cover. To ensure their shielding effect, epithelia are naturally able to cope with constant environmental insults. This ability is enabled by their morphology and architecture, as well as the continuous turnover of stem and progenitor cells that constitute their building blocks. Stem cell fate decisions and dynamics are fundamental key biological processes that allow epithelia to exert their functions. By focusing on the skin epidermis, this review discusses how tissue architecture is generated during development, maintained through adult life, and re-established during regeneration.
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