Hindgut GI Tract - Perfusion/Innervation

Question 1

The descending colon arise from?

Answer 1

transverse colon

Question 2

the descending colon drains into?

Answer 2

Sigmoid Colon

Question 3

Function of the descending colon

Answer 3

Absorption of water, concentration of feces

Question 4

Blood supply of the descending colon

Answer 4

Inferior mesenteric artery via left colic artery

Question 5

Innervation of the descending colon

Answer 5

pelvic splanchnic nerves (parasympathetic); thoracic sympathetic trunk L1-L2 (sympathetic),
sensation pathways: unconscious/reflex (vagus) pain (sympathetic)

Question 6

Sigmoid colon arises from?

Answer 6

Descending colon

Question 7

Sigmoid colon empties into?

Answer 7

rectum

Question 8

Blood supply of the sigmoid colon

Answer 8

Inferior mesenteric artery via sigmoid arteries

Question 9

Innervation of the Sigmoid Colon

Answer 9

pelvic splanchnic nerves S2-S4 (parasympathetic);
abdominal sympathetic trunk L1-L2 (sympathetic),
sensation pathways: unconcious/reflex (pelvic splanchnic) pain (sympathetic)

Question 10

Function of the sigmoid colon

Answer 10

Absorption of water, concentration of feces

Question 11

Rectum arises from?

Answer 11

Sigmoid Colon

Question 12

Rectum empties into?

Answer 12

Anus

Question 13

Function of rectum

Answer 13

Passage of feces out of digestive tract via anus

Question 14

Blood supply of rectum

Answer 14

Inferior mesenteric artery via superior rectal branches, internal iliac artery

Question 15

Innervation of rectum

Answer 15

pelvic splanchnic nerves S2-S4 (parasympathetic);
abdominal sympathetic trunk L1-L2 (sympathetic),
sensation pathways: unconcious/reflex & pain (pelvic splanchnic)