2.02: Digestive System Flashcards
Lining mucosa of Oral Cavity
SSNKE, majority of cavity
Masticatory mucosa
SSE Keratinized
- includes gingiva, hard palate, dorsum of tongue
Specialized mucosa
Location of tastebuds
Layers of Oral Mucosa
Epithelium –> lamina Propia –> submucosa –> muscularis + adventitia/seros
Where is the muscularis mucosa located?
between mucosa and submucosa, thin layer of smooth muscle
Vermillion zone of lip
- RED transition zone of lip
- no salivary glands
- keratinized epithelium, contains eleidin
- capillaries near surface
outer surface of lip contains….
- contains hair follicles, sebaceous glands, and sweat glands
inner surface of lip (lining mucosa)
SSNKE
- labial salivary glands in submucosa
- skeletal muscle
- also found in cheek mucosa, ventral tongue surface, floor of mouth, and soft palate
Masticatory Mucosa (hard palate and gingiva) contains..
both ortho and parakeratinized epithelium
Orthokeratinized
no nuclei in keratinized layers
parakeratinized
cells contain nuclei in keratinized layers
Soft palate
prevents food from going from oropharynx to nasopharyx
What are the 4 types of lingual papillae in the anterior portion of the tongue?
- Filiform, fungiform, circumvallate, foliate
What is found in the posterior 1/3 of the tongue?
Lingual tonsils
enamel
- produced by ameloblasts (which are absent after the tooth erupts)
- lines are enamel rods
Oral vestibule
bound by lips, teeth, cheeks
oral cavity proper
bound by teeth, floor of mouth, hard and soft palate
oropharynx
between naso and laryngopharynx
crown of tooth
above gum line
cervix/neck of tooth
surrounded by gingiva, junctional epithelium with occluding junctions
root
below gum line
alveolus
tooth socket in jaw, teeth are held in place by ligaments (sharpeys fibers)
Dentin
- made by odontoblasts
- lines are dentinal tubules
Cementum
- produced by cementoblasts
pulp
- pulp chamber is in crown
- root canals in root
-contains fibroblasts
Pneumonic for tooth stages
Butter cant beat margarine
Bud stage
- tooth bud
- oral epithelim invaginates as process of dental lamina
Cap stage
- enamel organ grows
- ameloblasts appear that will form inner enamel epithelium
- dental papilla (makes dentin and pulp later)
- dentin follicle/sac (surrounds enamel)
Early bell and late bell stage
- Dentin and enamel is clearly developed
- alveolus forms and becomes bony
- crown takes final shape
maturation stage
- root fully develops
- enamel breaks through oral epithelium to oral cavity
