A & P 3: Lab A

Visceral pleura

simple squamous epithelium

parietal pleura

simple squamous epithelium

muscles of inspiration

1) Sternocleidomastoid

2) Scalenes

3) Pectoralis minor

4) external intercostals

5) Diaphragm

Muscles of expiration

1) internal intercostals

2) abdominal muscles

Pseduostratified columnar epthelium

• goblet cells

• ciliated cells

• most of the conducting zone

Muscularis mucosa

smooth muscle

Submucosa

• seromucous glands in trachea and bronchi

• blood vessels

• nerves

• lymphatic vessels (not identifiable)

Cartilaginous layer

hyaline cartilage

• has chondrocytes in lacunae

• perichondrium

Adventitia

Irregular connective tissue

Trachae and extrapulmonary bronchi

Trachea

16 c shaped Hyaline cartilage

• kinda like this supporting cartilage for bronchi

Trachaelis muscle

smooth muscle

Tracheal Cartilage

Hyaline cartilage

Bronchus

Hyaline cartilage

Bronchiole

• epithelium

• smooth muscle

• alveoli

• no cartilage

• collapsed lumen

• no seromucous glands

• darking staining epithelium

alveoli

simple squamous epithelium

Blood vessels

simple squamous epithelium

Conducting zone sequence

1) Trachea

2) Main Bronchus

3) Lobar Bronchus

4) Segmental Bronchus

5) Bronchioles

lined by pseudostratified columnar epithelium

Respiratory zone

Alveoli

Mucosa

includes

• epithelium

• lamina propria

• muscularis mucosa