Week 4: Histology of the Upper Respiratory system Flashcards
What is a merocrine secrection/gland?
Cell remains intact
What is an apocrine secretion/gland?
Part of the cell is lost
What is a holocrine secretion / gland?
All of the cell is lost
What is an exocrine secretion?
Secretion on to body surface
What is an endocrine secretion?
Secretion into blood vessel
What is a paracrine secretion?
Secretion directly into the tissues
Where is the olfactory mucosa?
Sphenoethmoidal recess
What cells are in respiratory epithelium?
Ciliated cells, goblet, basal, brush and granule
What are the germinative cells of respiratory epithelium?
Basal cells
What are brush cells?
Isolated cuboidal - with blunt microvilli - function: mechanoreceptors
What are granule cells? Resp
Isolated cuboidal to columnar - tight J, dense core secretory vesicles. Endocrine syst.
What is in the olfactory LP?
Tubulo-alveolar glands (Bowmans glands, exocrine, merocrine, serous). Olfactory nerve central processes.
Difference between resp and olfactory epithelium?
No goblet cells in olfactory
Olfactory nerve cells
PArt of PNS, Bipolar, golgi type 1, body has large central euchromatic nucleus + surface vesicle, non-motile cilia - chemanoreceptors that contain oderant molecueles
Oral mucosa classifc
Stratified squaous ep
Mastictary mucosa
Para-keratinised strat squmous ep. Gums and hard palate
What are the types of mucosa in the oral cavity?
Specialised, parakeratinasied, non keratinised
Where is lingual tonisl loated?
Posterior 1/3 tongue
What are the minor salivary glands?
Small branched acinar serous secreting
What are the types of papillae called on tongue?
Filiform, circumvallate, fungiform and foliate
Where are foliate pap located?
Posterior lateral dorsum
WHere are the Fungiform pap located?
aNTERIOR dorsum
PArts of the salvion
Acini, intercalated ducts, striated ducts, excretory ducts (interlobular)
WHAT is the parotid duct (Secretions)
Serous
What is submandibular gland
Mixed - mainly serous
What is sublingual duct ? secretions
Mainly Mucus
THE ____ cells are located ____ at the base of the acinar epithelium
Myoepithelial cells, inside the basal lamina
Where are the paryngeal tonsils located?q
Nasopharynx
What cartilage is epiglottis?
Elastic
What is the mucosa of larynx?
MOstly resp, but vocal folds and epiglottis are - non-keratinsed stratified squamous
