H8 - Respiratory Histology

Question 1

what is the full name of respiratory epithelium?

Answer 1

non keratinised pseudostratified ciliated columnar epithelium with goblet cells

Question 2

What is lamina propia?

Answer 2

a band of connective tissue containing sub mucous glands and rich venous plexus

Question 3

what lines the roof of the nasal cavity ?

Answer 3

specialised olfactory epithelium

Question 4

what lines the initial part of the nasal cavity ?

Answer 4

keratinised stratified, squamous epithelium

Question 5

what lines the oropharynx?

Answer 5

non-keratinised stratified epithelium

Question 6

what lines the larynx?

Answer 6

walls are made of cartilage and muscles with respiratory epithelium

vocal folds and adjacent structures are covered with stratified squamous epithelium

Question 7

what lines the tracheas?

Answer 7

15 - 20 rings of C shaped cartilage

respiratory epithelium backed by basal lamina, lamina propia of connective tissue with abundant elastic fibres and a submucosa of loose connective tissue with numerous seromucosa glands

Question 8

what lines the bronchi?

Answer 8

• irregularly shaped cartilage
• respiratory epithelium, lamina propia, smooth muscle ring, seromucosa with adipose tissue and glands
• decreases in height from columnar to cuboidal

Question 9

what lines the bronchioles?

Answer 9

• smooth muscles which respond to parasympathetic innervation & histamine
• ends at a cuboidal ciliated epithelium and have ciliated club cells

Question 10

what are club cells?

Answer 10

• stem cells
• detoxification
• immune modulation
• surfactant production

Question 11

what are the characteristics of type 1 alveoli epithelium?

Answer 11

simple squamous epithelium that lines alveolar surface

Question 12

What are the characteristics of type 2 alveoli epithelium?

Answer 12

polygonal shape, free surface covered by microvilli and has a dense membrane bound lamellar bodies containing surfactant