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Flashcards in GI Deck (18)
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1
Q

Layers of the Alimentary canal

A
  1. ) Mucosa (epithelium, lamina propria, muscularis mucosae)
  2. ) Submucosa
  3. ) Muscularis externa
  4. ) Serosa/Adventitia
2
Q

Epithelial lining of the oral cavity

A

stratified squamous

3
Q

Epithelial lining of the esophagus

A

stratified squamous

4
Q

Epithelial lining of the stomach

A

simple columnar

5
Q

Epithelial lining of the intestine

A

simple columnar

6
Q

describe the muscularis mucosae (general alimentary canal)

A

composed of SMOOTH muscle only

7
Q

location of Meissner’s Plexus

A

Submucosa

8
Q

Location of Auerbach’s plexus

A

between the longitudinal and circular layers of the muscularis externa

9
Q

Serosa vs Adventitia

A

Serosa is within the peritoneal cavity - simple squamous epithelium

Adventitia- OUTSIDE the peritoneal cavity- whispy fibers that blend into connective tissue of the surrounding structures

10
Q

Muscularis externa of the alimentary canal

A

two layers (inner circular and outer longitudinal)

smooth muscle in most of the canal (skeletal muscle in upper esophagus -mixed in middle esophagus)

11
Q

Layers of the Oral cavity

A

Epithelium
Lamina Propria
Submucosa

12
Q

What layers are absent in the oral cavity

A

No muscularis mucosae
No Muscularis externa
No serosa/adventitia

13
Q

Describe the submucosa of the oral cavity

A

Not clearly separated from . lamina propria (look where the glands are)

Minor salivary glands located here

14
Q

Minor salivary glands of the oral cavity

A

Intrinsic (located within the wall of the oral cavity)

Mucous secreting (watery- not very many enzymes)

Branched tubular glands

15
Q

Surface of the tongue

A

covered with stratified squamous epithelium (often straified on the dorsal side)

16
Q

Types of lingual papillae

A
  1. ) Filliform Papillae
  2. ) Fungiform Papillae
  3. ) Circumvallate
  4. ) Foliate Papillae
17
Q

Filliform Papilla

A

most abundant type

Mostly on the anterior of the tongue

keratinized, sharp point tips (tips point backwards)

NO SENSE functions- mechanical function, grabs onto food

18
Q

Fungiform Papillae

A

mushroom shaped

more abundant near the tip of the tongue (anterior)

taste buds located on the apical surface