Histology Flashcards
what is the initial part of the nasal cavity lined with
keratinised stratified squamous epithelium
how does the lining of the nasal cavity change as you go deeper
starts with keratinised stratified squamous epithelium before losing the keratin. Finally it changes to “respiratory epithelium”
what is “respiratory epithelium”
pseudo stratified ciliated columnar epithelium with goblet cells
what is the oropharynx lined with
non-keratinised stratified squamous epithelium
what makes up the walls of the larynx and what covers its surfaces
cartilage and muscles covered by respiratory epithelium
what are the vocal cords covered by
stratified squamous epithelium
describe the cartilage of the trachea (number and shape)
15-20
“c” shaped
what is the trachea lined by
respiratory epithelium
what lines the bronchi
respiratory epithelium
describe the change in epithelium as you progress from smallest to largest bronchioles
epithelium decreases in height from columnar to cuboidal
what are terminal bronchioles
the smallest bronchioles which lack respiratory function
what are respiratory bronchioles
bronchioles with respiratory function
what lines alveolar cells
type 1 and type 2 alveolar cells
describe type 1 alveolar cells, what is their purpose
simple squamous epithelium
provides minimal thickness barrier for gas diffusion
describe type 2 alveolar cells, what is their purpose
polygonal shaped, free surfaces covered in microvilli
produce surfactant via lamellar bodies
