06.2 Intestine Anatomy Flashcards
What is the diameter of the large intestine?
Broad (4-6cm)
What of the small intestine and large intestine have villi present?
Small intestine
What are the circular folds called in the small intestine?
Plicae circularis
What are Peyer’s patches and where are they found?
Lymphatic tissue.
In the ileum.
What are the longitudinal bands of the large intestine called?
Taeniae coli
What are the sacs that give the large intestine its segmented appearance?
Haustra.
What are the fat pouches on the large intestine called?
Epiploic appendages.
When does the duodenum become the jejunum?
When it passes the ligament of Treitz and enters the peritoneum.
What are the characteristics of the jejunum?
Red wide and thicker than the ileum.
What is the arterial supply to the ileum and jejunum?
The jejunal and ideal arteries which branch from the SMA.
What is the blood supply of the caecum?
Ileocolic artery which is a branch of the SMA
What is the arterial supply of the ascending colon?
Right colic artery which is a branch of the SMA.
What artery supplies the first part of the transverse colon?
Middle colic artery which is a branch of the SMA.
What is the arterial supply of the descending colon?
Left colic artery which is a branch of the IMA.
What is the arterial supply of the sigmoid?
Sigmoid arteries which are a branch of the IMA.
What does the IMA become when it enters the pelvis?
Superior rectal artery.
What is the watershed area of the colon?
The distal part of the transverse colon, it is prone to ischaemia due to its blood supply.
What is the marginal artery of the colon?
It allows the anastamosis of the colic arteries from the SMA and the IMA.
What two veins converge to form the hepatic portal vein?
Splenic vein and the superior mesenteric vein.
What is the diameter of the small intestine?
Narrow (3.5-4.5cm)
