Epithelial function refers to the role and functions of epithelial cells in the body. Epithelial cells are the building blocks of various tissues and organs, forming a protective barrier that lines the surfaces of the body and regulates the exchange of molecules and ions. Research in this area focuses on understanding how epithelial cells contribute to the maintenance of tissue integrity, barrier function, and communication with neighboring cells. This research also investigates the various diseases and conditions that can arise when epithelial function is disrupted, such as inflammatory bowel disease, cystic fibrosis, and certain types of cancers. Overall, exploring epithelial function is crucial for gaining insights into the mechanisms underlying tissue homeostasis and diseases, and for developing new therapeutic strategies to target epithelial dysfunction.