[MT] histologic features of the different types of bronchi

epithelium is Pseudostratified ciliated columnar epithelium with goblet cells

Primary (Main) Bronchi

Secondary (Lobar) Bronchi

Tertiary (Segmental) Bronchi

cartilage is C-shaped hyaline cartilage rings (like trachea)

Primary (Main) Bronchi

cartilage is Irregular cartilage plates instead of rings

Secondary (Lobar) Bronchi

cartilage is Smaller, irregular cartilage plates

Tertiary (Segmental) Bronchi

smooth muscle is Present; relatively thin layer

Primary (Main) Bronchi

smooth muscle is More prominent smooth muscle layer

Secondary (Lobar) Bronchi

smooth muscle is Well-developed smooth muscle layer

Tertiary (Segmental) Bronchi

glands is Seromucous glands in submucosa

Primary (Main) Bronchi

glands is Seromucous glands still present but reduced

Secondary (Lobar) Bronchi

glands is Few seromucous glands

Tertiary (Segmental) Bronchi

diameter is Largest diameter (~1 cm)

Primary (Main) Bronchi

diameter is Smaller than primary bronchi

Secondary (Lobar) Bronchi

diameter is Smallest bronchi before transitioning to bronchioles

Tertiary (Segmental) Bronchi

Function is Conducts air to and from the lungs

Primary (Main) Bronchi

Function is Conducts air to different lung lobes (3 in right, 2 in left)

Secondary (Lobar) Bronchi

Function is Conducts air to specific bronchopulmonary segments (10 in right, 8-10 in left)

Tertiary (Segmental) Bronchi