Lecture 29: Pulmonary Histology Flashcards
What epithelium lines the nares?
Stratified squamous epithelium continuous with epidermis; nares contain sebaceous and suderiferous glands and hair follicles
What is respiratory epithelium?
Pesudostratified ciliated columnar epithelium
Olfactory epithelium
located in nasal cavity roof; respiratory epithelium WITHOUT goblet cells; no distinct basement membrane
Sustentacular cells
Support cells with pigment granules (olfactory epithelium)
Basal cells
Have pigment granules; stem cells - give rise to immature olfactory cells (olfactory epithelium)
Olfactory cells
Bipolar neurons; apical end projects into nasal cavity as knoblike ending w/ non-motile cilia (G-protein linked odor receptors); basal end of cell extends as unmyelinated axon bundled with other similar axons through the ethmoid plate to mitral cells located in olfactory bulb; senesce and replaced by basal cells
Olfactory glands of Bowman
Located in lamina propria, secrete odorant binding protein which binds to odorant molecule in nasal cavity
Waldeyer’s Ring
Ring of lymphoid tissue around nasopharynx which includes tonsils and adenoids; “portal” in back of nasopharynx that encounters airborne antigens and initiates immune response
Lingual surface of epiglottis
Covered with stratified squamous epithelium; lamina propria with loose CT and elastic fibers
Pharyngeal surface of epiglottis
Covered with respiratory epithelium; lamina propria with tubuloacinar seromucous glands
False vocal cords
Covered with respiratory epithelium, lamina with seromucous glands
True vocal cords
Covered with stratified squamous epithelium, lack seromucous glands in lamina propria
Name all 5 tissues found in larynx
Respiratory epithelium, stratified squamous epithelium, hyaline cartilage, elastic cartilage, skeletal muscle
Mucosa of trachea
Respiratory epithelium, thick basement membrane; Lamina propria with delicate FECT and lymphatic tissue
Submucosa of trachea
Many seromucous glands