Histo: Nasal Cavity, Larynx, Pharynx DSA Flashcards
conducting portion
removal of particles, warming, cooling, humidifying
no gaseous exchange
150cc of dead space
respiratory epithelium
ciliated pseudostratified columnar epithelium with goblet cells
glands in lamina propria
smooth m.
elastic fibers and cartilage
as you go down - cilia, glands, cartilage disappear
- smooth m increases
- epithelium - cuboidal
components of conducting portion
nose
nasopharynx
larynx
vestibule of nasal cavity
stratified squamous keratinized epithelium
- hair follicles
- changes to respiratory epithelium
respiratory portion of nasal cavity
respiratory epithelium with thick BM
-CT below - lamina propria
lamina propria
contains:
- mixed glands
- plexus of large thin walled veins
- merges with periosteum overlying bone
olfactory region
in respiratory portion of nasal cavity
olfactory epithelium
olfactory epithelium
pseudostratified columnar with NO goblet cells
- three cell types:
- bipolar neurons
- sustentacular - supporting
- basal cells -regenerative
sub-epithelium - tubulo-alveolar glands of bowman
-secrete serous fluids to trap odorous substances
to trap odorous substances
serous fluid from tubulo-alveolar glands of bowman
-in sub-epithelium of olfactory region
axons of olfactory neurons
project through cribrioform plate
-synapse at olfactory bulbs
uvula
posterior soft palate
-stratified squamous non-cornified epithelium
inferior extent of nasopharynx
superior extent of oropharynx
nasal region of nasopharynx
proximal
-respiratory epithelium
oral region of nasopharynx
distal
-stratified squamous non-keratinized epithelium
auditory tube
connected to nasopharynx
- swallowing - orifice opens
- equalizes pressure between tympanic cavity and external auditory meatus
lined with respiratory epithelium
larynx
cilia beat towards oral pharynx
-two portions - epiglottis and vocal cords
