Histology Flashcards
What type is respiratory epithelium?
psuedostratified columnar ciliated epithelium
Are cilia ever present on true stratified epithelia?
No
What are the 3 cells of the respiratory epithelium?
- ) psuedostratified columnar ciliated epithelium
- ) Goblet cells
- ) non-ciliated basal cells (stem cells)
What do goblet cells release?
Granules via exocytosis
What are the three portions of the nasal cavity? What are each lined by?
- ) Nasal vestibule - located just inside the nostril. keratinized stratified squamous
- ) Respiratory region - lined with psuedostratified columnar ciliated epithelia
- ) Olfactory region - lines the specialized olfactory mucosa
What are the two hallmarks of olfactory mucosa?
- ) Thicker
2. ) no goblet cells - would block odorant molecules
What are the 4 types of cells in the olfactory mucosa?
- ) Olfactory receptor cells
- ) Basal cells
- ) Brush cells
- ) supporting/sustentacular cells
Basal cells
Stem cells for olfactory receptor and supporting cells
Brush cells
Ciliated, columnar epithelial cells
Supporting/sustentacular cells
Provide mechanical and metabolic support to olfactory receptor cells
What kind of cartilage is the trachea made of?
Hyaline cartilage
Are the rings of the trachea complete? What does this allow for?
No, the posterior side is incomplete. Flexibility of the air tube
What are the four cell layers of the trachea?
- ) Mucosa
- ) Submucosal
- ) Cartilaginous
- ) Adventitia
What is the mucosal layer made of?
Psuedostratified columnar ciliated epithelia and the lamina propria
What is contained within the submucosal layer?
Glands
