Epithelia constitute the surfaces and lining of our bodies and provide a protective envelope against external environment but also regulate water, nutrient absorption and glandular secretions. Although epithelia can be multilayered (stratified) or single-layered (simple) they both need to constantly replace damaged or dead cells during the life. Adult stem cells are responsible for this process of tissue homeostasis critical for the maintenance of the tissue. At certain location of the body, transition zone
Géraldine Guasch, Ph.D, HDR
Véronique Chevrier, Ph.D