Epithelial research focuses on studying the properties, functions, and diseases of epithelial tissues in the human body. Epithelial tissues are a type of tissue that cover the surfaces of the body, line the cavities and organs, and serve as a barrier between different body compartments. This research area aims to understand the roles of epithelial cells in processes such as cell differentiation, cell signaling, and immune responses, as well as the mechanisms underlying epithelial-related diseases such as cancer, autoimmune disorders, and infections. Researchers in this field use various techniques such as cell culture, animal models, and molecular biology to investigate the biology of epithelial tissues and develop new therapies for related diseases.