Oral Cavity Flashcards
Name the 3 classifications of oral mucosa.
Masticatory, specialized and lining epithelium.
Location and function of Masticatory epithelium.
Covers surfaces involved in processing food (tongue, hard palate, gingivae). Lines with stratified squamous epithelium, that is keratinized to different degrees.
Location and function of Lining epithelium.
Covers the remaining surfaces of the tongue with non-keratinized stratified squamous epithelium. Found at lips, floor of mouth, soft palate, ventrum of tongue.
Location and function of Specialized lining epithelium.
The taste buds, found on the dorsum of the tongue.
Describe the muscular build of the tongue.
The tongue is basically a large mass of skeletal muscle. It has both extrinsic and intrinsic.
Describe Extrinsic tongue muscles.
Extrinsic muscles originate outside the tongue and and are responsible for moving the tongue in and out of the mouth
Describe Intrinsic tongue muscles.
The intrinsic muscles originate inside the mouth and are responsible for altering the shape of the tongue.
Describe Filiform papillae.
These are shaped like fire, most numerous and cover most of the dorsal surface of the tongue. Do not contain taste buds. Used for scraping food off a surface. These have increased keratinization.
Describe Fungiform papillae.
These look like a mushroom. They are stratified squamous nonkeratinized - so they have blood flow. They have taste buds on the dorsal aspect of their cap.
Describe Foliate papillae.
Look like filing cabinets, more tall than they are tall. Found on the posterolateral aspect of tongue. They have taste buds only in the neonate. Glands of von Ebner (serous salivary glands) empty into the base of the furrows.
Describe Circumvallate papillae.
Found in a V-shape anterior to the sulcus terminalis. These are wider than they are tall. These are submerged a little, and are surrounded by an epithelial groove. The groove has ducts of von Ebner. Their sides and groove (not dorsum) have taste buds.
