Respiratory 1 Flashcards
respiratory epithelium is…
pseudostratified ep.
major conducting airway in neck/thorax
single tube, not paired
elastic CT
seromucociliary clearence
trachea
ciliated, pseudostratified ep. with goblet cells
mucosa
(muscosa) apical motile cilia for seromucociliary clearence; before pharynx
columnar cells
(muscosa) unicellular exocrine glands, secrete mucous apically, few apical microvilli
goblet cells
(muscosa) secrete paracrine factors basally
some secretions regulate muscle contraction
small mucous granule cells
(muscosa) L.P. loose CT + MALT; elastic lamina @ interface of muscosa and submucosa
basal stem cells
dense fibroelastic CT
seromucous glands
exocrine
complex acinar
submucosa
hyaline cartilage rings with smooth muscle that connects the ends of the “C” posteriorly
adventia
common air and food passage, funnel shaped with muscular walls
lined by respira. ep. and some stratified squamous ep.
L.P. loose MALT aggregates
pharynx
(pharynx) seromucous glands whose ducts empty onto luminal service
submucosa
(pharynx) skeletal muscle
adventitia
roof –> epiglottis; keeps food and fluid from entering (stratified squamous)
floor –> bilateral folds of mucosa/submucosa tract push into lumen (kertinized)
ep. = res ep. except for epiglottis/folds
L.P. large MALT aggregates
larynx
(larynx) CT with some seromucous glands, free edge of each vocal fold is reinforced by very dense CT
submucosa
(larynx) elastic cartilage in epiglottis
adventitia
mucociliary clearence, cilia beat back towards pharynx, highly vascularized L.P., little submucosa
ep. –> respiratory except for anterior most portion near nostrils (merge with strat. sqaumous)
L.P. loose CT –>highly vascularized
mucociliary clearence due to goblet cells in res ep.
nasal cavity
(nasal cavity) almost non existent
submucosa
(nasal cavity) cartilage anteriorly/bone posteriorly
adeventitia
modified res. ep. –> contains olfactory cells = sensory neurons; dendrites end in modified sensory cilia which are embedded in odorant-containing sustercular cells
olfcatory ep.
Bowman’s serous glands; watery serous secretions trap “odorant” chemicals such that receptors on sensory dendrites are activated by them to smell
olfactory lamina propria
