Transverse Colon

Question 1

Site

Answer 1

1. Strats from right colic flexure at right hypochondrial region
2. Descends down to umbilical region
3. End at left colic flexure in left hypochondrial region

Question 2

Length

Answer 2

18-20 inches long

Question 3

Peritoneal covering

Answer 3

Completely covered by peritoneum and has mesentery (transverse mesocolon)

Question 4

Transverse mesocolon

Answer 4

Peritoneal fold formed of 2 layers and found behind ascending posterior 2 layers of greater omentum

Question 5

Tranverse mesocolon: borders

Answer 5

1. Free border
2. Attached border

Question 6

Free border

Answer 6

Contains transverse colon (transverse colon 1st part 2 inches are bare of peritoneum and lie directly on duodenum 2nd part)

Question 7

Attached border (root)

Answer 7

Attached to posterior abdominal wall along following structures from right to left:
1. Anterior surface of pancreas head
2. Anterior border of pancreas body

Question 8

Transverse mesocolon: contents

Answer 8

1. Transverse colon in free border (except 1st 2 inches)
2. Branches of middle colic artery
3. Ascending branch of superior left colic artery
4. Lymph vessels and nodes
5. Sympathetic plexuses
6. Extraperitoneal fat

Question 9

Relations: anterior

Answer 9

1. Inferior surface of liver right lobe
2. Gall bladder body and fundus
3. Stomach greater curvature
4. Greater omentum

Question 10

Relations: posterior

Answer 10

1. Duodenum 2nd part
2. Pancreas head
3. Duodenojejunal flexure and jejunum coils
4. Left kidney

Question 11

Arterial supply

Answer 11

Right 1/3: ascending branch of right colic artery (branch of superior mesenteric artery)
Middle 1/3: middle colic artery artery ( branch of superior mesenteric artery)
Left 1/3: ascending branch of superior left colic artery (branch of inferior mesenteric artery)

Question 12

Venous drainage

Answer 12

Into superior and inferior mesenteric veins