Large Intestine Flashcards
What are the parts of the large intestine?
Cecum
Ascending colon
Transverse colon
Descending colon
Sigmoid colon
Rectum
What are teniae coli?
Three longitudinal smooth muscle bands in the colon wall (approx. 8 mm wide)
Tenia libera
Tenia omentalis
Tenia mesocolica
What are haustrae coli?
Saccular pouches of the colon
Where does the vermiform appendix arise from?
Lower part of the cecum
Where the 3 teniae coli meet
What are omental appendices, and where they are located?
Small pouches of peritoneum filled with adipose tissue and situated along the large intestine and upper part of the rectum
Name the direct branches of the superior mesenteric artery that supply the large intestines.
Ileocolic a.
Right colic a.
Middle colic a.
Name the direct branches of the inferior mesenteric artery that supply the large intestine.
Left colic a.
Sigmoid a.
Superior rectal a.
Name the flexures of the rectum.
Sacral flexure
Perineal flexure
Describe the peritoneal relations of the rectum.
Upper third is intraperitoneal.
Middle third is retroperitoneal.
Lower third is infraperitoneal.
Where does the superior third of the rectum receive its blood supply from?
Superior rectal a. (from inferior messenteric a.)
Where does the middle third of the rectum receive its blood supply from?
Middle rectal a. (from internal illiac a.)
Where does the inferior third of the rectum receive its blood supply from?
Inferior rectal a. (from internal pudendal a.)
Where is the venous blood from the upper third of the rectum drained to?
—> Superior rectal v. - inferior mesenteric v - Portal hapatic vein
Where is the venous blood from the middle third of the rectum drained to?
—> Middle rectal v. - internal illiac v. - common iliac v. - Inferior Vena Cava
Where is the venous blood from the inferior third of the rectum drained to?
—> Inferior rectal v. - internal pudendal v. - internal illiac v. - common illiac v. - IVC
