Respiratory Histology

Question 1

what is the upper respiratory tract?

Answer 1

nasal cavity to pharynx

Question 2

what is the lower respiratory tract

Answer 2

larynx to alveoli

Question 3

what are the 4 main layers in the walls of the conducting areas of the resp tract

Answer 3

• Respiratory mucosa = the epithelium and underlying lamina propria
  
  • Submucosa (contains mucous glands needed to moisten air)
  • Cartilage and or muscle layer
  • Adventitia- outermost connective tissue holding the structure together

Question 4

what is the classification of the respiratory mucosa?

Answer 4

ciliated pseudostratified columnar epithelium

Question 5

what are the distinguishing features of the olfactory epithelium?

Answer 5

bipolar neurons (which can be regenerated by basal cells)
serous glands (no goblet cells)
supporting columnar cells
classified as pseudostratified columnar epithelium

Question 6

what is unique about the larynx histology ?

Answer 6

true cord and upper epiglottis - non keratinised stratified epithelium is present
to protect against abrasion and turbulent flow of air