Prelim | Bronchi & Bronchioles Flashcards
Partitions of the bronchi
Primary/ main bronchi
Secondary/ lobar bronchi
Tertiary/ segmental bronchi
Size of the primary bronchi
R is wider, shorter (2-3cm vs 5cm of L) and more vertical
Shape of primary bronchi
Tubular
Location of primary bronchi
R: enters lung at T5
L: enters lung at T6
Composition of the primary bronchi
Cartilages, muscles
Function/s of the primary bronchi
Passageway of air
Point where the trachea divides into right and left primary bronchi
Carina
The carina is formed by a posterior and somewhat inferior projection of the last —
tracheal cartilage
The — of the carina is one of the most sensitive areas for triggering a cough reflex
mucous membrane
How many lobar bronchi does the R and L lung have?
R lung: 3 lobar bronchi
L lung: 2
How many segmental bronchi does the R and L lung have?
R lung: 10 segmental bronchi (2 superior lobe, 2 middle lobe, 5 inferior lobe)
L lung: 8 tertiary bronchi (4 upper lobe, 4 lower lobe)
End of conducting zone
Terminal bronchioles
What cells do terminal bronchioles contain?
Clara cells
Clara cells are what types of cells?
Columnar non-ciliated cells
Functions of the clara cells
Protect against garmful effects of inhaled toxins and carcinogens
Produce surfactants
Functions as stem cells
