3.1.3 The Small Intestine Flashcards
Where do the Small Intestines extend from / to?
From - The Pyloric Sphincter
To - The Ileocecal Valve
What are the 3 parts of the Small Intestines?
- The Duodenum
- The Jejunum
- The Ileum
Which part of the Small Intestines has the opening of the Bile and Pancreatic Duct?
The Duodenum
What are the 4 parts of the Duodenum?
Proximal to Distal
- The Superior Part of the Duodenum
- The Descending Part of the Duodenum
- The Inferior Part of the Duodenum
- The Ascending Part of the Duodenum
Where is the Foregut / Midgut Boundary in the Small Intestine?
Between the Descending and Inferior Parts of the Duodenum
How is the Duodenum Peritonised?
It is Retroperitoneal
How is the Jejunum Peritonised?
It is Intraperitoneal
How is the Ileum Peritonised?
It is Intraperitoneal
What is the Shortest, Widest, and most Fixed part of the Small Intestine?
The Duodenum
Where is the Boundary between the Jejunum and the Ileum?
There isn’t one, there is a gradual change
What is the characteristic Colour of the:
a) Jejunum
b) Ileum
Jejunum - Deep Red
Ileum - Paler Pink
What is the characteristic Wall of the:
a) Jejunum
b) Ileum
Jejunum - Thick Intestinal Wall
Ileum - Thin Intestinal Wall
What is the characteristic Vascularity of the:
a) Jejunum
b) Ileum
Jejunum - There is Greater Vascularity
Ileum - There is Less Vascularity
What is the characteristic Vasa Recta of the:
a) Jejunum
b) Ileum
Jejunum - Longer
Ileum - Shorter
What are Vasa Recta?
Straight Arteries coming from the Arcades in the Mesentery
