Histology Flashcards
what does the nasal cavity do?
warms, moistens and cleans air
what is the histology of the nasal cavity…
roof: olfactory epithelium
initial part: keratinised stratified squamous epithelium
deeper than vestibule: respiratory epithelium (ciliated columnar epithelium with goblet cells)
describe the respiratory epithelium…
lines most of respiratory tract- contains seromucous glands & thin walled venous sinuses
what is the histology of the oropharynx and epiglottis…
non-kertinized stratified squamous epithelium
what is the histology of the larynx …
respiratory epithelium
histology of vocal chords….
stratified squamous epithelium
what type of cartilage has the trachea got?
hyaline- C shaped cartilage
what is the histology of the bronchi?
respiratory epithelium with irregular cartilage plates
True/False: respiratory epithelium is made up of - lamina propria - muscularis - submucosa with adipose tissue and seromucous glands
True
what happens as you move down bronchial tree…
cartilage becomes discontinuous and eventually none
columnar cells become cuboidal
less goblet cells
Give an overview of terminal bronchioles
these are the smallest bronchioles where no gas exchange occurs
- they branch to start of respiratory tree
- lined with cuboidal ciliated epithelium
- contain non-ciliated club cells
- eventually epithelium replaced by squamous T1 alveolar cells
what happens to bronchioles in an asthma attack?
respond to parasympathetic innervation so constrict
what are the walls of alveoli made up of?
t1 alveoli cells, endothelial cells, basal lamina
what is the epithelium of alveoli made up of?
T1 & T2 alveoli cells
True/False:
Type 1 alveoli cells have lamellar bodies which contain surfactant
False:
T2 cells- store and produce surfactant
T1 cells- simple squamous epithelium so provide a thin barrier for better gas diffusion
