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Histology > Digestive System > Flashcards

Digestive System Flashcards

(48 cards)

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1
Q

Contents of the Digestive System:

A
  1. Oral Region
  2. Alimentary Canal
  3. Extrinsic Glands
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2
Q

Basic Histological Layers:

A
  1. Mucosa
  2. Submucosa
  3. Muscularis Externa
  4. Serosa/Adventitia
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3
Q

Mucosa:

A

a. Epithelium
b. Lamina Propria
c. Muscularis Mucosa

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4
Q

Submucosa:

A

a. Submucosal Plexus
b. “Plexus of Meissner”

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5
Q

Muscularis Externa:

A

a. Myenteric Plexus
b. “Plexus of Auerbach”

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6
Q

Lining epithelium of mucosa is made of _________

A

simple squamous columnar epithelium.

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7
Q

It sits on a basement membrane

A

Mucosa

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8
Q

Mucosa:

Its______ is made of loose connective tissue full of macrophages and lymphocytes.

A

Lamina Propria

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9
Q

Mucosa:
______ separate mucosa from submucosa contraction of which leads to increase contact of epithelium with food.

A

Muscularis mucosae

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10
Q

A layer of dense connective tissue

A

Submucosa

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11
Q

Rich in blood vessels

A

Submucosa

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12
Q

controls glandular secretions, alters electrolyte and water transport.

A

Plexus of Meissner

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13
Q

Sometimes, it may contain mucus glands.

A

Submucosa

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14
Q

Two layers of smooth muscle fibers (inner circular and outer longitudinal)

A

Muscularis Externa

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15
Q

What is distributed between the two muscle layers - regulates the peristaltic waves that move the food from esophagus to anal opening in the Muscularis Externa

A

Myenteric (Auerbach) nerve plexuses

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16
Q

With the submucosal nerve plexuses, they help propel and mixing the food.

A

Muscularis Externa

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17
Q

A layer of loose connective tissue covered by a layer of simple squamous epithelium called mesothelium

A

Serosa/Adventitia

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18
Q

It contains the lymphatic and blood vessels of the GI tract and fat tissue.

A

Serosa/Adventitia

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19
Q

Function of the Digestive System

A
  1. Movement of food
  2. Secretion of Digestive Juices
  3. Absorption of digested foods, water, and electrolytes.
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20
Q

Its function is simple passage from one part to another.

21
Q

Its function is storage of food or feces

Study These Flashcards
A

Stomach or Distal Colon

22
Q

Its function is digestion

Study These Flashcards
A

Stomach, Small Intestine

23
Q

Its function is absorption of end products

Study These Flashcards
A

Small intestine, Proximal Colon

24
Q

Oral Region:

Study These Flashcards
A
  1. Lips
  2. Palate
  3. Teeth and associated structures
  4. Tongue
  5. Major Salivary Glands
  6. Lingual Tonsil
25
Three Types of Oral Mucosae:
1. LINING MUCOSA 2. MASTICATORY MUCOSA 3. SPECIALIZED MUCOSA
26
What type of epithelium is the Lining Mucosa?
Stratified Squamous Nonkeratinized Epithelium
27
Where is the Lining Mucosa located?
Remainder of the Oral Cavity
28
What type of epithelium is the Masticatory Mucosa?
Stratified Squamous Keratinized Epithelium
29
Where is the Masticatory Mucosa located?
Hard Palate, Gingivae, Dorsal Surface of the Tongue
30
What type of epithelium is the Specialized Mucosa?
Stratified Squamous Nonkeratinized with Taste Buds
31
Where is the Specialized Mucosa located?
Soft Palate, Dorsum of the Tongue, Pharynx
32
3 regions of the Lips:
1. EXTERNAL (SKIN) REGION 2. VERMILLION ZONE 3. INTERNAL REGION
33
3 regions of the Lips: Lined by stratified squamous keratinized
EXTERNAL (SKIN) REGION VERMILLION ZONE
34
3 regions of the Lips: Lined by stratified squamous nonkeratinized
INTERNAL REGION
35
3 regions of the Lips: With hair follicles, sebaceous and sweat glands
EXTERNAL (SKIN) REGION
36
3 regions of the Lips: Occasional sebaceous glands (Fordyce’s Granules)
VERMILLION ZONE
37
3 regions of the Lips: Minor salivary glands, and occasional sebaceous glands (Fordyce’s granules)
INTERNAL REGION
38
Separates the nasal from the oral cavity
PALATE
39
2 types of Plate:
1. HARD PALATE (BONY SHELF) 2. SOFT PALATE (SKELETAL MUSCLE)
40
Oral aspect is lined by stratified squamous parakeratinized to keratinized epithelium
HARD PALATE (BONY SHELF)
41
Oral aspect is lined by stratified squamous nonkeratinized epithelium
SOFT PALATE (SKELETAL MUSCLE)
42
Contains adipose tissue and minor mucous salivary glands.
HARD PALATE (BONY SHELF)
43
Contains minor mucous salivary glands.
SOFT PALATE (SKELETAL MUSCLE)
44
Teeth is composed of:
1. Internal Soft Tissue 2. Pulp 3. 3 Calcified Layer: a. Enamel b. Cementum c. Dentin
45
Covers the crown
ENAMEL
46
96% Calcium hydroxyapatite
ENAMEL
47
4% enamelin (ameloblasts)
ENAMEL
48
Acellular
ENAMEL

Histology (37 decks)

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