Ch.38 Transverse & Small Colon

Question 1

What is the transverse colon connected to

Answer 1

1. Dorsally to the pancreas
2. Dorsal aspect of abdominal cavity
3. Root of the mesentery
4. Duodenum

Question 2

How long is the small colon

Answer 2

3.5meters

Question 3

Diameter of small colon

Answer 3

7 - 10 cm

Question 4

Where does the descending mesocolon originate

Answer 4

Left surface of root of mesentery

Question 5

How many tenia has the small colon

Answer 5

2
Antimesenteric
and
mesenteric which is concealed by mesocolon

Question 6

Blood supply to the transverse and descending colon

Answer 6

Cranial mesenteric
-> middle colic
-> Transverse
then anastomoses with left colic a.

Caudal mesenteric
->left colic a
-> orad 75% of small colon

Caudal mesenteric a
-> cranial rectal a.
-> 25% ab-orad small colon

Question 7

Which of these statements is correct

a. The transverse colon is short and passes from left to right, cranial to the cranial mesenteric artery.

b. The small colon is suspended by the descending mesocolon, which originates from the left surface of the root of the mesentery and continues caudally to the rectum.

c. Originating from the cranial mesenteric artery, the middle colic artery supplies the transverse colon before anastomosing with the left colic artery.

d. The left colic artery is one of three branches of the caudal mesenteric artery and is responsible for the blood supply to the oral 75% of the small colon.

Answer 7

c. Originating from the cranial mesenteric artery, the middle colic artery supplies the transverse colon before anastomosing with the left colic artery.

The transverse colon is short and passes from right to left, cranial to the cranial mesenteric artery.

It is suspended by the descending mesocolon, which originates from the left surface of the root of the mesentery and continues caudally until it turns into the mesorectum.

The left colic artery is one of the two branches of the caudal mesenteric artery and is responsible for the blood supply to the oral 75% of the small colon.

Question 8

Which of these statements is correct

a. The aboral 25% of the small colon derives its vascular supply from the cranial rectal artery, the second branch of the caudal mesenteric artery.

b. The aboral 25% of the small colon derives its vascular supply from the cranial rectal artery, the third branch of the caudal mesenteric artery.

c. The aboral 25% of the small colon derives its vascular supply from the cranial rectal artery, a branch of the cranial mesenteric artery.

d. The aboral 75% of the small colon derives its vascular supply from the cranial rectal artery, the second branch of the caudal mesenteric artery.

Answer 8

a. The aboral 25% of the small colon derives its vascular supply from the cranial rectal artery, the second branch of the caudal mesenteric artery.