2.02: Digestive System

Question 1

Lining mucosa of Oral Cavity

Answer 1

SSNKE, majority of cavity

Question 2

Masticatory mucosa

Answer 2

SSE Keratinized
- includes gingiva, hard palate, dorsum of tongue

Question 3

Specialized mucosa

Answer 3

Location of tastebuds

Question 4

Layers of Oral Mucosa

Answer 4

Epithelium –> lamina Propia –> submucosa –> muscularis + adventitia/seros

Question 5

Where is the muscularis mucosa located?

Answer 5

between mucosa and submucosa, thin layer of smooth muscle

Question 6

Vermillion zone of lip

Answer 6

• RED transition zone of lip
• no salivary glands
• keratinized epithelium, contains eleidin
• capillaries near surface

Question 7

outer surface of lip contains….

Answer 7

• contains hair follicles, sebaceous glands, and sweat glands

Question 8

inner surface of lip (lining mucosa)

Answer 8

SSNKE
- labial salivary glands in submucosa
- skeletal muscle
- also found in cheek mucosa, ventral tongue surface, floor of mouth, and soft palate

Question 9

Masticatory Mucosa (hard palate and gingiva) contains..

Answer 9

both ortho and parakeratinized epithelium

Question 10

Orthokeratinized

Answer 10

no nuclei in keratinized layers

Question 11

parakeratinized

Answer 11

cells contain nuclei in keratinized layers

Question 12

Soft palate

Answer 12

prevents food from going from oropharynx to nasopharyx

Question 13

What are the 4 types of lingual papillae in the anterior portion of the tongue?

Answer 13

• Filiform, fungiform, circumvallate, foliate

Question 14

What is found in the posterior 1/3 of the tongue?

Answer 14

Lingual tonsils

Question 15

enamel

Answer 15

• produced by ameloblasts (which are absent after the tooth erupts)
• lines are enamel rods

Question 16

Oral vestibule

Answer 16

bound by lips, teeth, cheeks

Question 17

oral cavity proper

Answer 17

bound by teeth, floor of mouth, hard and soft palate

Question 18

oropharynx

Answer 18

between naso and laryngopharynx

Question 19

crown of tooth

Answer 19

above gum line

Question 20

cervix/neck of tooth

Answer 20

surrounded by gingiva, junctional epithelium with occluding junctions

Question 21

root

Answer 21

below gum line

Question 22

alveolus

Answer 22

tooth socket in jaw, teeth are held in place by ligaments (sharpeys fibers)

Question 23

Dentin

Answer 23

• made by odontoblasts
• lines are dentinal tubules

Question 24

Cementum

Answer 24

• produced by cementoblasts

Question 25

pulp

Answer 25

- pulp chamber is in crown - root canals in root -contains fibroblasts

Question 26

Pneumonic for tooth stages

Answer 26

Butter cant beat margarine

Question 27

Bud stage

Answer 27

- tooth bud - oral epithelim invaginates as process of dental lamina

Question 28

Cap stage

Answer 28

- enamel organ grows - ameloblasts appear that will form inner enamel epithelium - dental papilla (makes dentin and pulp later) - dentin follicle/sac (surrounds enamel)

Question 29

Early bell and late bell stage

Answer 29

- Dentin and enamel is clearly developed - alveolus forms and becomes bony - crown takes final shape

Question 30

maturation stage

Answer 30

- root fully develops - enamel breaks through oral epithelium to oral cavity