2.2 SMA, IMA and Targets

Question 1

SMA & SMV pass anterior to … and posterior to … of the pancreas

Answer 1

uncinate process and neck

Question 2

The duodenum is mostly retroperitoneal except for what segment?

Answer 2

Superior

Question 3

The descending segment of the duodenum contains what?

Answer 3

major duodenal papilla

Question 4

Superior segment of duodenum anchored to liver via …

Answer 4

hepatoduodenal ligament

Question 5

Ascending portion of duodenum anchored to diaphragm via… (helps regulate flow by changing tension)

Answer 5

suspensory ligament

Question 6

Superior portion of duodenum has a smooth inner wall …., which receives chyme from stomach

Answer 6

duodenal cap (ampulla)

Question 7

Rest of the internal wall of the duodenum has folds of mucosa called…

Answer 7

place circulares

Question 8

The horizontal portion of the duodenum passes … to SMA and SMV.

Answer 8

posterior

Question 9

Arterial supply to the pancreas (body and tail) via pancreatic aa. via …

Answer 9

splenic a.

Question 10

Arterial supply (from celiac trunk) to the pancreas and duodenum via …

Answer 10

superior pancreaticoduodenal aa. (via gastroduodenal a. from common hepatic a.)

Question 11

Arterial supply from SMA to the pancreas and duodenum via…

Answer 11

inferior pancreaticoduodenal a.

Question 12

Venous drainage of most of the pancreas via…

Answer 12

pancreatic vv. from splenic v.

Question 13

Venous drainage of head of pancreas and duodenum via.

Answer 13

pancreaticoduodenal vv. from SMV

Question 14

Erosion of the wall of the Duodenum(ampulla) due to peptic ulcers leads to pancreatitis and GI bleed because of what structures?

Answer 14

gastroduodenal a. and pancreas

Question 15

Lymph from pancreas and duodenum (foregut) drains into what nodes?

Answer 15

pyloric nodes -> celiac nodes -> cisterna chyli

Question 16

Small intestine is anchored to the posterior wall by …

Answer 16

mesentery proper

Question 17

Root of mesentery proper courses obliquely from … to …

Answer 17

cecum to distal (ascending segment) duodenum

Question 18

Does the jejunum or the ileum have very tall place circulares?

Answer 18

jejunum (they increase surface area b/c absorbing more nut. here)

Question 19

Which, the jejunum or the ileum, has fewer, larger arcades (~1 row)?

Answer 19

jejunum

Question 20

Which, the jejunum or the ileum, has short vasa recta?

Answer 20

ileum

Question 21

Which, the jejunum or the ileum, has longer vasa recta?

Answer 21

jejunum

Question 22

Which, the jejunum or the ileum, has more numerous, smaller arcades?

Answer 22

ileum

Question 23

Which, the jejunum or the ileum, has Peyer’s patches?

Answer 23

Ileum

Question 24

What flexure is between ascending and transverse colon?

Answer 24

Hepatic flexure

Question 25

What flexure is between transverse and descending colon?

Answer 25

Splenic flexure

Question 26

Longitudinal muscles of colon wall condensed into three bands..., begin at root of appendix and merge into continuous muscular layer at rectum.

Answer 26

taenia coli

Question 27

What gathers colon into pouches called haustra?

Answer 27

Plicae semilunares

Question 28

Is the ascending colon retroperitoneal or intraperitoneal?

Answer 28

retroperitoneal - peritoneum only on anterior surface

Question 29

What is in the appendix's mesentery (mesoappendix)?

Answer 29

appendicular artery

Question 30

The transverse colon is fused to the underside of the greater omentum, and attached to the wall by the ...

Answer 30

transverse mesocolon (extends along inf. pancreas, and descending duodenum)

Question 31

droplets of fatty mesentery project from the surface of colon (typically associated with taenia coli.

Answer 31

epiloic (omental) appendages

Question 32

What branch off the SMA goes toward the transverse colon in the transverse mesocolon?

Answer 32

Middle colic a.

Question 33

What branch off the SMA goes towards the ascending colon?

Answer 33

right colic a.

Question 34

What branch off the SMA travels obliquely to the junction between the ileum and the colon?

Answer 34

Ileocolic a.

Question 35

The middle, right and ileocolic arteries all supply ... which parallels the colon and distributes blood to the organ through vasa recta?

Answer 35

marginal artery

Question 36

lymphatics of small intestine are called ..., they carry all dietary lipids, only route to bloodstream and liver.

Answer 36

lacteals

Question 37

lymphatics from the midgut drain into ... which continue to cisterna chyli

Answer 37

superior mesenteric nodes

Question 38

What branch off the IMA goes towards the descending colon?

Answer 38

left colic a.

Question 39

What branch off the IMA goes towards the sigmoid colon in the sigmoid mesocolon?

Answer 39

sigmoid arteries (2-3)

Question 40

What branch off the IMA goes towards the top of the rectum?

Answer 40

superior rectal a.

Question 41

What is the only intraperitoneal portion of the hindgut?

Answer 41

sigmoid

Question 42

IMV drains into ...

Answer 42

splenic v then into hepatic portal vein