1.4 Basic Histology of the Gut Tube Flashcards

1
Q

Does the entire G.I. tract share common Histological features?

A

Yes

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2
Q

What are the 4 distinct functional layers throughout the G.I. tract?

A
  1. The Mucosa (Mucous Membrane)
  2. The Sub-Mucosa
  3. The Muscularis Externa (Propria)
  4. The Serosa / Adventitia
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3
Q

What is the Mucosa (Mucous Membrane) made up of?

A
  1. Epithelium
  2. Lamina Propria
  3. Muscularis Mucosae
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4
Q

What is the Muscularis Externa (Propria) made up of?

A
  1. Inner Circular Muscle

2. Outer Longitudinal Muscle

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5
Q

What is the difference in the areas covered by Serosa, than Adventitia?

A

The Areas covered by the Serosa are also covered by Peritoneum
The Areas covered by the Adventitia are areas which are not covered by the Peritoneum

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6
Q

What are the 4 basic Mucosal types in the G.I. tract?

A
  1. Protective
  2. Secretory
  3. Absorptive
  4. Absorptive / Protective
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7
Q

Where is the Protective Mucosa seen?

A
  1. The Oral Cavity
  2. The Pharynx
  3. The Oesophagus
  4. The Anal Canal
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8
Q

Where is the Secretory Mucosa seen?

A

This is seen only in the Stomach

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9
Q

Where is the Absorptive Mucosa seen

A

This is typical of the Small Intestine

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10
Q

Where is the Absorptive / Protective Mucosa seen?

A

This lines the whole of the Colon

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