ANAT 216 Lecture Notes - Lecture 5: Pulmonary Alveolus, Simple Squamous Epithelium, Goblet Cell
28 Apr 2018
School
Department
Course
Professor
ANAT 216 week 2 lecture 3
Respiratory System
Conducting
bronchial
tree
Primary bronchi: start at T5 airways that bring air to each of the lungs,
divide into 3 secondary bronchi, R is shorter, wider + more vertical,
pseudo columnar cells
Secondary (lobar) bronchi: one for each lobe, L side divides into 2 and R
into 3
Tertiary (segmental) bronchi: each bronchopulmonary seg has one, 10 on
L and 10 on R
Terminal bronchioles: one supplies one pulm lobule, contain Clara cells
(secrete surfactant, detox and act as stem cells)
C shaped cart replaced by islands and then by nothing at bronchioles
Epithelium at proximal end is RTE w Goblet cells pseudo columnar
ciliated simple cuboidal simple cuboidal in terminal bronchioles
Scattered smooth muscle complete layer at bronchioles level smaller
layer at terminal bronchioles (as amount of cart decreases amount of
smooth muscle increases)
Respiratory
bronchial
tree
Resp bronchioles: contains alveoli, simple cuboidal simple squamous
epithelium, contain dust cells (macrophages) that eat antigen leaves thru
interalveolar septum follows CT to lung surface leaving carbon deposits
that outline lobules of lung
Smooth muscle dissipates as elastic fibers increase
Alveolar ducts: covered in alveoli, end in terminal cluster called alveolar
sac, simple squamous
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Document Summary
Primary bronchi: start at t5 airways that bring air to each of the lungs, divide into 3 secondary bronchi, r is shorter, wider + more vertical, pseudo columnar cells. Secondary (lobar) bronchi: one for each lobe, l side divides into 2 and r into 3. Tertiary (segmental) bronchi: each bronchopulmonary seg has one, 10 on. Terminal bronchioles: one supplies one pulm lobule, contain clara cells (secrete surfactant, detox and act as stem cells) C shaped cart replaced by islands and then by nothing at bronchioles. Epithelium at proximal end is rte w goblet cells pseudo columnar ciliated simple cuboidal simple cuboidal in terminal bronchioles. Scattered smooth muscle complete layer at bronchioles level smaller layer at terminal bronchioles (as amount of cart decreases amount of smooth muscle increases) Resp bronchioles: contains alveoli, simple cuboidal simple squamous epithelium, contain dust cells (macrophages) that eat antigen leaves thru interalveolar septum follows ct to lung surface leaving carbon deposits that outline lobules of lung.
