nasal epithelium. ciliated columnar epithelium

ciliated epithelium columnar cell anatomy cilia mucus lining respiratory disease cross mucosa cells poster isometric flat villus villi epidermis immunity microvilli medical tissue health human layer body science biology infection structure medicine epithelial cancer nucleus simple membrane surface histology education smell sense sinus anatomical diagram olfaction olfactory goblet production airway inflammation barrier allergic rhinitis 3d