Abdomen 2

Question 1

superior mesenteric artery (SMA)

Answer 1

supplies the midgut with blood

Question 2

the midgut includes?

Answer 2

• distal part of the duodenum
• jejunum
• ileum
• cecum
• appendix
• colon up to the splenic flexure (i.e., ascending colon and transverse colon)

Question 3

where does the SMA arise from?

Answer 3

from the abdominal aorta around the L1 vertebral level and gives off several branches that travel through the mesentery to reach midgut viscera.

Question 4

intestinal (jejunal and ileal) branches

Answer 4

• arise from the SMA throughout its course and
  supply blood to the jejunum and ileum
• the intesinal arteries form intesinal arcades
  and vasa recta (straight arteries)

Question 5

arcades

Answer 5

are arching networks formed by several
intesinal branches

Question 6

vasa recta

Answer 6

project from the arcades to the walls of the small
intesine

Question 7

where are there less arcades and longer vasa recta?

Answer 7

near the jejunum

Question 8

where are there more arcades and shorter vasa recta?

Answer 8

ileum

Question 9

inferior pancreaticoduodenal arteries

Answer 9

arise from the SMA near its origin from the aorta
and supply the pancreas and duodenum with blood

Question 10

the inferior ____ arteries anastomose with the superior _____ arteries and ultimately form the? thus, there is an anastomosis between?

Answer 10

• inferior pancreaicoduodenal
• superior pancreaicoduodenal
• celiac trunk
• between the SMA and celiac trunk

Question 11

middle colic artery

Answer 11

arises from the SMA near its origin and courses superiorly toward the transverse colon to supply it with blood

Question 12

right colic artery

Answer 12

arises from the SMA and courses laterally toward the right to supply the ascending colon with blood

Question 13

ileocolic artery

Answer 13

is the terminal branch of the SMA and courses inferiorly and to the right to supply the ileocolic junction with blood

Question 14

appendicular artery

Answer 14

• is a small branch of the ileocolic artery that supplies the appendix
• the appendicular artery is in the mesoappendix

Question 15

inferior mesenteric artery (IMA) supplies?

Answer 15

the hindgut with blood

Question 16

hindgut includes?

Answer 16

• colon distal to the splenic lexure (i.e., descending colon and sigmoid colon)
• rectum

Question 17

the IMA arteries arise from the?

Answer 17

abdominal aorta around the L3 vertebral level and gives of several branches that travel through the mesentery to reach the hindgut

Question 18

left colic artery

Answer 18

arises from the IMA and courses laterally to the let to supply the descending colon with blood

Question 19

the sigmoid artery

Answer 19

is often present as multiple branches of the IMA that descend toward the sigmoid colon to supply it with blood.

Question 20

superior rectal artery

Answer 20

is the terminal branch of the IMA and descends toward the pelvic cavity to supply the superior part of the rectum with blood

Question 21

marginal artery (of drummond) is formed by?

Answer 21

formed by the anastomosis of the terminal branches of the right colic, middle colic, and ileocolic arteries from the SMA and left colic and sigmoid arteries from the IMA

Question 22

the continuous arching loop of the marginal artery travels along and supplies blood to where?

Answer 22

• travels along the border of the colon
• ensures constant blood supply to the colon

Question 23

the marginal artery marks the location of an?

Answer 23

anastomosis between the SMA and IMA