Lecture 23 Large intestine and Liver Flashcards
what does the large intestine consist of?
- Cecum
* Colon
the colon of the LI is divided into 4 parts what are they?
- Ascending
- Transverse
- Descending
- Sigmoid
the Ascending and descending colon of LI are?
retroperitoneal
the Transverse and sigmoidal colon of LI are?
intraperitoneal
what does the Ileocecal Valve do?
Regulates the passage of material into the cecum
whats the appendix?
- Reserve of LI bacteria population
- Variety of locations
- Inflammation = appendicitis
whats Barium enema?
enables x-ray image to be taken of LI to assess function
no backflow into the ileum
whats included in the gross structure of the LI?
Teniae Coli:
Haustra:
Omental appendices:
whats Teniae Coli?
- Modification of Muscularis layer
- 3 bands of longitudinal smooth muscle
- Stronger contraction
whats Haustra?
• Series of pouches in the wall of colon
whats Omental appendices?
• Sacs of fat
is there lots or little villi in LI?
lack of villi
in the gut tube, the Mucosa invaginates to form what?
intestinal glands
the muscularis mucosae does not invaginate
what does the mucosa consists of?
- Epithelium
- Lamina propria
- Muscularis mucosae
whats the function of the mucosa of the colon?
Water and salt absorption
Goblet cells produce mucous (protection and lubrication)