Term
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Definition
Bordered: Anteriorly = lips Psoteriorly = oropharynx Lined: oral mucosa -continuous with skin at vermillion border -continuous with GI at pharynx |
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Term
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Definition
1. Protection 2. Sensation 3. Secretio 4. Thermal Regulation 5. Speech 6. Respiration |
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Term
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Definition
-barrier to microorganisms -withstands mechanical trauma However: some things can penetrate mucosa in areas where epithilium is thinner |
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Term
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Definition
Receptors for: -taste -touch -temperature -pain -salivation -certain neuromuscular reflexes |
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Term
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Definition
-saliva -sebum (very minor) |
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| Oral Mucosa - Thermal Regulation |
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Definition
-insignificant in humans -heat may be radiated from body via panting ex. RUSTY (he smells like angels) |
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Definition
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| Oral Mucosa - Respiration |
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Definition
conduit for inhalation and exhalation
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Term
Differences Between Oral Mucosa and Integument (5) |
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Definition
Oral Mucosa =
1. more deeply colored 2. has moist surface 3. no skin appendages except Fordyce granules (sebaceous glands) 4. smooth except rugae, tongue papilla, linea alba, and surface stippling 5. localized variation in firmness and surface texture |
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Term
Divisions of oral mucosa within the Oral Cavity (4) |
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Definition
1. Masticatory Mucosa 2. Lining Mucosa 3. Specialized Mucosa 4. Mucosal Junctions a. mucocutaneous junction b. mucogingival junction
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Term
Divisions of oral mucosa within the Oral Cavity Masticatory Mucosa |
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Definition
-on gingiva and hard palate -thick ortho/parakeratinized strat. squam. epith over a densly collagenized connective tissue -directly adheres to periosteum (mucoperiosteum)
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Term
Divisions of oral mucosa within the Oral Cavity Lining Mucosa |
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Definition
-soft palate, ventral surface of tongue, floor of mouth, lower part of alveolus, lips, and labial and buccal mucosa -thin non-keratinized (lips are ortho/parakeratinized) attached to underlying bone or muscle via loose irregular collagenous connective tissue -minor salivary glands, adipose tissue, and Fordyce granules present in e.g. soft palate, buccal and labial mucosa |
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Term
Divisions of oral mucosa within the Oral Cavity Specialized Mucosa |
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Definition
-thick keritinized or nonkeritinized strat. squam. epith -forms diff tupes of lingual papillae -connective tissue contains rich nerve and vascular supply -posterior aspect = minor salivary glands -specialized for taste |
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Term
Divisions of oral mucosa within the Oral Cavity Mucosal Junction A. Mucocutaneous Junction |
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Definition
-seperate ciircumoral skin from vermillion zone of lips -lip epithilium = thin + keritinized + prominante vasularized rete pegs = red appereance of lips -lack of skin appendages -exception sebaceous glands
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Term
Divisions of oral mucosa within the Oral Cavity Mucosal Junction B. Mucogingival Junction |
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Definition
-seperates alveolar mucosa from attached gingiva Alveolar Mucosa = nonkeritanized strat. squam. epi = loose lamina propria = high elastic fiber content Attached Gingiva = keritinized strat. squam. epi = lamina propria contains coarse collegen bundles (attached directly to periosteum)
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Term
Tissue components of Oral Cavity (5) |
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Definition
1. Oral Mucosa 2. Rete Pegs 3. Lamina Propria 4. Lymphoid Tissue 5. Submucosa |
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Term
Tissue components of Oral Cavity Oral Mucosa (superficial -> deepest) |
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Definition
1. Startum Corneum 2. Startum Granulosum 3. Stratum Spinosum 4. Startum Basale |
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Term
Tissue components of Oral Cavity Oral Mucosa Startum Conreum |
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Definition
-outermost -either orthokeratin or parakeratin |
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Term
Tissue components of Oral Cavity Oral Mucosa Startum Granulosum |
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Definition
-thin layer of flattened cells -contain basophilic keratohyalin granules -nonkeratinized = granular and cornified layers replaced with stratum intermedium and superficial |
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Term
Tissue components of Oral Cavity Oral Mucosa Startum Spinosum |
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Definition
-THICKEST -cells are polyhedral
-prominent circumferential desmosomal attachments -contains Langerhans cells |
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Term
Tissue components of Oral Cavity Oral Mucosa Startum Basale |
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Definition
-single layer of cuboidal/columnar cells -deeply staining nuclei -mitotically active layer -gives rise to cells that mature and later exfoliate -contains melanocytes -contains Merkel cells |
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Term
Tissue components of Oral Cavity Rete Pegs |
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Definition
-concical projections -superficial connective tissue -interdigitate with epithelial ridges -form attachment interface with high surface area = more resistant to shearing forces -nerves, capillaries, venules, and lympatics =used to supply and drain the epithelium
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Term
Tissue components of Oral Cavity Lamina Propria (2 layers) |
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Definition
-zone of connective tissue -supports epithilium -seperates epi from submucosa and.or other structures -rich supply of neural + vascular stuff Consists of 2 Layers 1. Papillary Layer - found among epithelial ridges 2. Reticular Layer - irregularly oriented collagen bundles (collegen more dense than in papillary) - not named for presentce of any reticular connectve tissue NO RETICULAR CONNECTIVE TISSUE |
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Term
Tissue components of Oral Cavity Lympoid Tissue
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Definition
normal = scatteres lymphocytes and plasma cells throughout the subepithelial connective tissue
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Term
Tissue components of Oral Cavity Submucosa |
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Definition
-found in lips, cheeks, and portions of palate -less densly crowded collagen bundles than in lamina propria -lots of nerve + vascular tissue -minor salivar glands -fat |
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Term
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Definition
| all cells that eventually form keratin |
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Term
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Definition
in oral cavity Langerhans cells, melanocytes, and Merkel cells |
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Term
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Definition
migrating leukocytes found within oral surface epi |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue (5) |
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Definition
1. Terminal Sulcus and the 4 papillae 2. Filiform Papillae 3. Fungiform Papillae 4. Foliate Papillae 5. Circumvallate papillae |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue Terminal Sulcus |
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Definition
V-shaped groove seperates body of tongue from tongue base |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue Filiform Papillae |
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Definition
-elongated structure -anterior portion of tongue (numerous) -thin connective tissue core -overlying start. squam. epi -tall spire of parakeratin -NO TASTE BUDS associated |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue Fungiform Papillae |
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Definition
-dome or mushroom shaped -among filiform om anterior tongue -thin nonkeratinized strat. sqam. epi -contain surface taste buds
-thick coonective tissue core -sweet and salty tastes |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue Foliate Papillae |
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Definition
-posterolateral tongue -not prominent in humans -parrallel array of mucosal ridges -contain taste buds along the ridge inclines (lateral) |
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Term
Specialized Oral Mucosa: Dorsum of the Tongue Circumvallate Papillae |
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Definition
-8-12 large papillae -anterior aspect of terminal sulcus -encircled by deep groove -minor salivary glands ducts empty into ex. glands of von Ebner
-seperior surface = keratinized strat. squam. epi -lateral surface = nonkeratinized + many intersperses taste buds -acid, sour, bitter taste |
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Term
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Definition
-chemoreceptors (modified epithelial cells) -on tongue, palate, pharynx, and epiglottis -most numerousl on oral tongue -encompass thickness of epith -ovoid shape -communicate with oral/pharyngeal cavity via small circular taste pore -3 types of cells 1. basal cell 2. gustatory cell 3. sustentacular (supporting) cell |
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Term
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Definition
1. Basal Cell - precusor cell (regenitive mitotic cell) 2. Gustoatory Cell - light-staining is taste receptor (daughter cell) 3. Sustentacular (supporting) cell - dark-stain that supports gustatory cell and is also taste receptor (daughter cell) 2+3 have unmyelinated nerve endings and have apical microvilli that protrude into tase pore 2 has closer relationship with nerve fibers
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Term
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Definition
-wide distibution of lymp tissu in oral cavity, subepithilial tissue, small nodules in floor of mouth, ventral tongue, and soft palate -concentratted in psterior in form of palatine, lingual and pharyngeal tonsils -this forms irregular ring of lymp tissue surrounding enterence of oropharynx |
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Term
| Age changes in Oral Mucosa |
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Definition
1. thinner epithilium 2. flattening of epithelial ridges 3. smoother surface 4. decreased number of filiform papillae 5. decreased number of Langerhans cells 6. vascular changes - lingual varices 7. increased number of Fordyce granules 8. decreased cellularity/increased collagen content of lamina propri 9. salivary gland atrophy - leads to alterations in taste, dryness of the mouth (xerostomia) and burning sensation 10. loss of definition of the vermillion border (mucocutaneous junction) (lip border not as defined)
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