Histology II Oct4 M2 Flashcards
name of muscle in trachea’s submucosa + where
trachialis muscle. between ends of hyaline cartilage C ring
glands found in trachea’s submucosa
serous acini and mucous acini
pulm bronchus: mucosa diff with trachea
epith has less goblet cells (want less mucous bc narrower)
pulm bronchus: submucosa diff with trachea
- plates of hyaline cartilage (discontinuous)
- SM is continuous
- ONLY SEROUS GLANDS
pulm bronchus: disposition of SM and cartilage
SM is oblique and wraps around bornchus in diff directions
Cartilage also oblique and goes in diff directions. is continuous
pulm bronchus: SM position relative to cartilage and glands
between cartilage and LP. Is most luminal portion of submucosa
regular bronchiole: mucosa diff with bronchus
- festum shape
- COLUMNAR
- no goblet cells
- LP less prominent (in the festum area)
regular bronchiole: submucosa diff with bronchus
- almost entirely SM cells
- NO CARTILAGE
- rare SEROUS glands
regular bronchiole: adventitia diff with bronchus
more tiny
terminal bronchiole: mucosa diff with regular bronchiole
- still columnar
- ciliated columnar cells + non-ciliated clara or club cells producing surfactant
- little bit of LP
terminal bronchiole: submucosa diff with regular bronchiole
- SM is only 1-2 layers
- NO glands
terminal bronchiole: adventitia diff with regular bronchiole
can be there but thinner
main diff between resp bronchiole and terminal bronchiole
resp is segmented (1-3 interruptions)
resp bronchiole: epith diff with term bronchiole
- no columnar cells
- only CUBOIDAL club cells
- no LP
resp bronchiole: submucosa diff with term bronchiole
1-2 layers of SM
resp bronchiole: adventitia diff with term bronchiole
no adventitia
alveolar duct main diff with resp bronchiole
much more segmented
alveolar duct remaining histo layers
epithelium. SQUAMOUS club cells
cell types in avleoli (7)
pneumocyte 1 pneumocyte 2 free alv macrophage fixed macrophage endothelial cell fibrocyte monocyte
alveolar pore def + other name
small opening between 2 alveoli when wall is incomplete
Pore of Kohn
pneumocyte type 1 def
flat cell, rests on BM, most of surface of alveoli
pneumocyte type 2 def
bulky cell embedded in epith lining, rests on BM
free macrophage function and what they do after
clear debris in airspace and then become fixed
alv septum: fiber found
elastin
endothelial cells: what type
squamous simple epith
pneumocyte type 2: important structures inside (2)
- mutli vesicular bodies (membrane with small vesicles inside), fuses with lamellar bodies
- lamellar bodies: contain surfactant
surfactant composition (is in lamellar bodies)
surfactant protein A,B,C,D + lecithin (phospholipid)
BM function in alveolar wall
shared between endothelial cells and pneumocyte type 1
emphysema pathophysiology (2)
- macrophages move to septum releasing elastases
- cigarette smoking inhibits synthesis of lactic fiber
last pseudostratified epith
in bronchus
last hyaline cartilage containing structrure
bronchus
first structure with club cells
terminal bronchiole
last structure with columnar cells
terminal bronchiole
last structure with adventitia
terminal bronchiole
last structure with goblet cells
pulm bronchus
last structure with capillaries
terminal bronchiole
last structure with serous glands
regular bronchiole
last structure with lamina propria
terminal bronchiole
