Oral Cavity and Salivary Glands Flashcards Preview

MSS - GI Exam 1 > Oral Cavity and Salivary Glands > Flashcards

Flashcards in Oral Cavity and Salivary Glands Deck (77)
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1

GI tract

oral cavity to anus and associated glands

2

GI tract function

digestion and absorption
-occurs outside of body
-food converted to absorbable substances

absorption occurs after digestion

3

oral cavity functions?

ingestion
mastication
deglutition

4

alimentary canal

small and large intestines

5

deglutition

swallowing

6

digestion and absorption

in alimentary canal

7

elimination

at rectum and anus

8

palatoglossal folds

posterior body of oral cavity

9

palate

roof of oral cavity
-hard and soft palate

10

lips

anterior border of oral cavity

11

oral cavity mucosa?

stratified squamous non-cornified epithelium

underlying connecting tissue

lots of abrasive force, so we have stratified squamous
-also, wet - not cornified**

and underlying connective tissue

12

parakeratinized

stratified squamous epithelium
-extra thickened layer of cell
-because there is more abrasive force

not true cornified layer

13

salivary glands

major:
parotid
submandibular
sublingual

minor - also present

all deliver saliva to oral mucosa

14

salivary amylase

breaks down carbohydrates

15

contents of saliva

salivary amylase
lactoferrin and lysozymes
secretory immunoglobulins (IgA)

water soluble

16

lactoferrin and lysozymes

attack bacterial antigens

17

secretory immunoglobulin in saliva

IgA

18

parotid gland

serous

19

submandibular gland

serous and mucous

20

sublingual gland

primarily mucous

21

minor glands

add to saliva production
-located in CT of oral mucosa

22

bolus

formed in mouth
-2cm diameter
-pushed by tongue into pharynx for swallowing

23

parotid gland

largest of salivary gland
-25% of salivary volume

compound tubulo-acinar gland

significant adipose tissue within gland

24

primary product of parotid gland

salivary amylase

25

submandibular gland

70% of saliva (with sublingual)
-mixed, mucous and serous

contains serous demilunes (crescent half moon shape) - product of cell fixation

serous cells - salivary amylase
mucous cells - secrete mucins

26

sublingual gland

mixed gland
-largely mucous

contains serous cells, mucous cells, and serous demilunes

products same as submandibular

27

minor salivary glands

only 5% of total salivary production
-in CT elements of oral mucosa throughout oral cavity

28

lips in three regions

external aspect
vermillion zone - colored area
internal aspect

29

external aspect of lip

covered with normal thin skin
continuous with vermillion zone

30

vermillion zone

pink region of lips
extensive dermal papillae
capillary loops impart colors
no hair or sweat gland

need to wet lips with tongue