Histology V - Respiratory System

Question 1

Conducting portion is lined by what cells?

Answer 1

cilliated pseudostratified epithelium.

Question 2

CEll types in conduction portion

Answer 2

Goblet cells -> mucus
Epithelial cells - protective barrier
Brush cells -> sensory

Question 3

Layers in trachea

Answer 3

1. Mucosa - epithelium, basement membrane, lamina propria (connective tissue directly under basalmembrane with vessels)
2. Submucosa - glands, loose connective tis
3. Cartilage
4. Adventitia (perichondrium)

Question 4

Layers in bronchi

Answer 4

discontinuous cartilage
thicc collagen vanishes
muscularis mucosa
submucosa again

Question 5

Bronchioles characteristics

Answer 5

Clara cells - secretory, dome shaped.
No goblet cells
not pseudostratified

Question 6

What cells are present in alveoli and what do?

Answer 6

Type I: thin epithelial cells, gas exchange
Type II: Secretory, surfactant.
Macrophages