1.4 Basic Histology of the Gut Tube Flashcards
Does the entire G.I. tract share common Histological features?
Yes
What are the 4 distinct functional layers throughout the G.I. tract?
- The Mucosa (Mucous Membrane)
- The Sub-Mucosa
- The Muscularis Externa (Propria)
- The Serosa / Adventitia
What is the Mucosa (Mucous Membrane) made up of?
- Epithelium
- Lamina Propria
- Muscularis Mucosae
What is the Muscularis Externa (Propria) made up of?
- Inner Circular Muscle
2. Outer Longitudinal Muscle
What is the difference in the areas covered by Serosa, than Adventitia?
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
What are the 4 basic Mucosal types in the G.I. tract?
- Protective
- Secretory
- Absorptive
- Absorptive / Protective
Where is the Protective Mucosa seen?
- The Oral Cavity
- The Pharynx
- The Oesophagus
- The Anal Canal
Where is the Secretory Mucosa seen?
This is seen only in the Stomach
Where is the Absorptive Mucosa seen
This is typical of the Small Intestine
Where is the Absorptive / Protective Mucosa seen?
This lines the whole of the Colon