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Flashcards in 510-5 Deck (18):
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3 functions of the oral cavity

1.) nutrient ingestion/digestion
2.) communication
3.) immune response

1

epidermis

keratinized, avascular, innervated

2

langerhans cells

(dendritic cells) can migrate through the epithelia to the dermis to present antigens to T lymphocytes

3

merkel's cells

(tactile cells) epidermal cells that contact a sensory neuron to form a mechanoreceptor

4

thick skin

does not have hair and is found on the palms and soles of feet

5

thin skin

has hair and is found everywhere but the palms and soles of feet

6

melanocyte

found in the basal layer of epithelium and injects melanin into keratinocytes via CYTOCRINE INJECTION

7

orbicularis oris

muscle of the lip

8

3 types of lip epithelia

1.) thin skin of the face- w/ hair and glands
2.) vermillion border- thin skin w/out hair, has sebaceous glands, highly innervated by MEISSNER'S CORPUSCLES
3.) oral mucosa- thick epithelia parakeratinized/nonkeratinized

9

4 layers of the digestive tract

1.) mucosa
2.) submucosa
3.) muscularis externa
4.) serosa

10

3 types of oral cavity mucosa

1.) lining
2.) masticatory
3.) specialized

11

rete ridges

ingrowth of epithelia

12

masticatory mucosa

found on the gingiva and hard palate (keratinized/parakeratinized) firmly attached to bone

13

4 layers of keratinization

1.) basal- hemidesmosomes attach cells to basal lamina
2.) spinosa- desmosomes attach cells to eachother
3.) granulosum- filled with keratin granules
4.) corneum- impermeable keratinized cells

14

fordyce's granules

clusters of sebaceous glands in the oral mucosa

15

gingiva

masticatory mucosa around the neck of the tooth

16

5 parts of gingiva

1.) attached
2.) free
3.) marginal/crest
4.) sulcular
5.) junctional

17

specialized mucosa

dorsal surface of the tongue