Olfactory
A
RE: Respiratory epithelium
L: Lymphatic tissue
A: Bipolar neurons.
Larynx
A
B
C
A: Pseudostratified ciliated columnar epithelium.
B: Submucosal glands.
C: Laryngeal cartilage.
Trachea
B
A
A: Tracheal gland
B: Respiratory epithelium
C: C– ring
Bronchi
B
A
A
C
A: Cartilaginous plates
B: Respiratory epithelium
C: Alveoli-
Bronchiole &Alveoli
B
A
C
D
A: Terminal bronchiole
B: Bronchiole
C: Alveoli
D: Dust cells