Oral Mucosa Flashcards
what are the functions of the oral mucosa?
protection (mechanical, infection, immunity), sensation, secretion, absorption, thermoregulation
describe masticatory mucosa
subjected to friction and compression , parakeratinised, thick lamina propria (mucoperiosteum)
descibre lining mucosa
mobile and distensible, nonkeratinised, loose lamina propria and wide submucosa, more rapid turnover than masticatory mucosa
where is masticatory mucosa found?
the palate and the gum surrounding the teeth
where is lining mucosa found?
on the lips and the cheeks
describe gustatory mucosa
similar to masticatory, keratinised, present only on dorsum of tongue, characterised by papillae, some bearing taste buds
where is gustatory mucosa found?
tongue
what is the structure of the mucosa?
epithelium -> lamina propria -> submucosa -> bone
what are the epithelium cell layers in the oral mucosa
stratum corneum, stratum granulosum, stratum spinosum, stratum germinativum
what are the layers of keratin going from the outermost to the innermost
keratin, keratohyalin granules, membrane-coated granules, tonofilaments
what is keratin?
tonofilaments in matrix of filaggrin
what are melanocytes
pigment producing in stratum germinativum
what are merkel cells
associated with mechanoreceptor neurons in stratum germinativum
what are langerhans cells
dendritic cells found above stratum germinativum, function as antigen-presenting cells
what are the different types of papillae found on the tongue?
filiform papillae, fungiform papillae and vallate papillae
