Histology

Question 1

Trachea

Answer 1

• columnar ciliated pseudo stratified epithelium with goblet cells
• Cartilage rings
• Mucosa: epithelium + lamina propria- basal cells, goblet cells and ciliated cells
• Submucosa: mucous glands + smooth muscle
• hyaline cartilage

Question 2

Conducting bronchi

Answer 2

• similar to trachea
• cartilage plates rather than rings
• fewer goblet cells
• fewer mucous glands
• columnar epithelium rather than pseudostratified

Question 3

bronchioles

Answer 3

diameter <1mm
No cartilage 
No glands/ no goblet cells 
smooth muscle is present 
cilia are present 
cuboidal epithelium

Question 4

Alveoli

Answer 4

• simple squamous
• macrophages
• type 1- flat
• type 2