Dr. Xanthine on Instagram: "animation by Maja Divjak, review by Davis & Wypych, 2021, in Mucosal Immunology, Cellular and functional heterogeneity of the airway epithelium "Respiration, be it through lungs, gills or skin, is a defining feature of life. In humans, the respiratory system is often divided into the proximal conducting airways, including the nasal cavity, trachea and bronchi, and the distal respiratory airways, including the respiratory bronchioles and alveoli. Though the primary res