Oral cavity esophagus and stomach Flashcards Preview

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Flashcards in Oral cavity esophagus and stomach Deck (29)
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1

oral cavity epithelium

Keratinized stratified squamous: gingiva (gums), hard palate (rooth of the mouth), dorsal surface of the tongue
Nonkeratinized stratified squamous: ventral surface of the tongue, floor of the mouth, mucosal surface of the lips and cheeks

2

Filiform papillae

long thread-like shape, partially keratinized

3

Fungiform papillae

mushroom-shaped projections contain taste buds

4

Circumvallate papillae

dome-shape structure, contain taste buds

5

Foliate papillae

small lateral folds of the mucosa, contain taste buds

6

Enamel

amelogengin, enamelin, hydroxyapatite crystals, ameloblasts

7

Dentin

predentin (type I collagen, glycosaminoglycans), hydroxyapatite crystals, odontoblasts

8

tooth layers

Enamel
Dentin
Cementum: cellular and acellular
Periodontal ligament
Gingiva
Aveolar process (bone)
Dental pulp

9

Minor Salivary Glands

-lingual, palantine, etc. located in the submucosa of the oral cavity.
-have short ducts which empty directly to the oral cavity.

10

Saliva

alpha amylase, lysozyme, secretory IgA, bicarbonate ion, water

11

Ducts of Major salivary glands

-Intercalated duct: (secrete bicarbonate ion, absorb chloride ion from the acinar product)
-Striated duct: reabsorption of sodium ion from the primary secretion, addition of potassium to the secretion
-Excretory Interlobular duct

12

Parotid gland

serous

13

Submandibular gland

mixed

14

Sublingual gland

predominant mucous component

15

Taste buds

present on the fungiform, circumvallate, and foliate papillae and in the oral and pharyngeal mucosa

16

Teeth

ameloblasts producing enamel, and odontoblasts producing dentin.

17

layers of the esophagus

-Mucosae (epithelium,
lamina propria, muscularis mucosae
-Submucosae (CT)
-Muscularis Externa
-Adventitia (CT) or Serosa (CT and epithelium)

18

Muscularis externa of esophagus

(inner circular, outer longitudinal)
a.) upper esophagus: striated muscle
b.) middle esophagus: striated and smooth muscle
c.) lower esophagus: smooth muscle

19

Adventitia in what area of esophagus

upper and middle esophagus

20

Serosa in what part of esophagus

lower esophagus

21

Esophago/gastric junction

an important site of common diseases: ulceration, Barrett’s esophagus and cancer.

22

Barrett’s Esophagus

Reflux of gastric acid secretions into the lower esophagus leads to changes of the stratified squamous epithelium to a gastric-type epithelium (simple columnar epithelium).

23

Ruga

a longitudinal fold of gastric mucosa and submucosa

24

Gastric Epithelium

Surface mucous cells (mucus cap)

25

Gastric Gland Epithelium:

-Mucous neck cells (soluble mucus)
-Parietal cells (HCl)
-Chief cells (pepsinogen)
-Enteroendocrine cells (hormones)
-Stem cells

26

The layer of mucus that lines the human stomach is a natural habitat of

H. Pylori

27

Parietal cell produces

HCL and intrinsic factor (exocrine)

28

Chief cell

zymogen granules contain pepsinogen and lipase (exocrine)

29

Enteroendocrine cell

membrane-bound secretory granules near the capillary