Small Intestine

Question 1

How long is the duodenum

Answer 1

10 inches (25 cm) long

Question 2

What type of peritoneum in the duodenum:

Answer 2

Mostly retroperitoneal. Except 1st part

1st part- intraperitoneal

Question 3

How many parts of the duodenum

Answer 3

4

Question 4

First part of the duodenum

Answer 4

duodenal bulb (cap)

Question 5

duodenum first part hase a pyloric orifice to the:

Answer 5

Gall bladder

Question 6

Where is the first part of the duodenum located?

Answer 6

Just to the right of L1

Question 7

Transpyloric plane level of 1st part of the duodenum

Answer 7

L1

Question 8

How long is the first part of the duodenum

Answer 8

2 inches (5cm)

Question 9

Location of the second part of the duodenum

Answer 9

From the gall bladder to the lower border of L3

Question 10

How long is the 2nd part of the duodenum

Answer 10

3 inches long

Question 11

Vertebral level of the 2nd part of the duodenum

Answer 11

L2 and L3

Question 12

Openings in the 2nd part of the duodenum

Answer 12

Major and minor duodenal papilla

Question 13

Longest part of the duodenum

Answer 13

Third part (horizontal/inferior part)

Question 14

How long is the 3rd part of the duodenum

Answer 14

3 inches (8 cm)

Question 15

Location of 3rd level of duodenum

Answer 15

Level of L3

Question 16

Length of 4th part of the duodenum

Answer 16

2 in (5cm)

Question 17

Where does the 4th part of the duodenum end

Answer 17

Duodenojejunal flexure (junction)

Question 18

Fibers holding the duodenojejunal flexure to the diaphragm- keeps small intestine from getting twisted up

Answer 18

Ligament of Treitz

Question 19

Is duodenal bulb smooth or tuberculated?

Answer 19

Smooth

Question 20

Major duodenal papilla

Answer 20

Opening to the hepatopancreatic ampula

Question 21

Minor duodenal papilla (DOES/DOES NOT) have a sphincter

Answer 21

Does not

Question 22

Plicae circularis

Answer 22

Circular folds in the duodenum?????? Double check on this

Question 23

Capillary beds in the duodenum are called the

Answer 23

Intestinal villi

Question 24

Duct that collects lipids in the duodenum

Answer 24

Lacteal duct

Question 25

Arterial supply to the duodenum

Answer 25

Upper half: Celiac trunk- supraduodenal artery and superior pancreaticoduodenal arter (anterior and posterior) Lower half: Superior mesenteric artery: Inferior pancreaticoduodenal artery (ant and post) First jejunal branch

Question 26

Length of jejunum and ileum

Answer 26

18-20 feet

Question 27

Location and length of jejunum

Answer 27

Proximal 8 feet | Lies in the left upper quadrant

Question 28

Location and length of ileum

Answer 28

Distal 12 feet Lies in the right lower quadrant

Question 29

Properties of internal jejunum

Answer 29

Deeper red Larger lumen Thicker wall Prominent plicae circulares

Question 30

External properties of jejunum

Answer 30

Less prominent arterial arcades Longer vasa recta Less mesenteric fat

Question 31

Atrial arcades

Answer 31

Arterial web-like network coming off of the artery towards the small intestine

Question 32

Vasa recta

Answer 32

Long finger-like arterials branching off of the arterial arcades, connecting to the small intestin

Question 33

Internal properties of the ileum

Answer 33

Pale pink Smaller lumen Thinner wall Fewer plicae circulares Peyer’s patches

Question 34

External ileum properties

Answer 34

More arterial arcades (more complex) Shorter vasa recta More mesenteric fat

Question 35

Peyer’s patches

Answer 35

Lymphoid tissue that fights large amounts of bacteria in undigested food, keeping it from entering the large intestine

Question 36

Arterial supply to the jejunoileum

Answer 36

Superior mesenteric arter

Question 37

Branches of the superior mesenteric artery that supply the small intestine (6)

Answer 37

Inferior pancreaticoduodenal artery Jejunal arteries Ileal arteries Ileocolic arter Right colic artery Middle Colic artery

Question 38

Branches of the ileocolic artery

Answer 38

Ileal branches Colic branches Anterior Cecal branch Posterior cecal branch Appendicular branch

Question 39

A 2-layered fold of peritoneum that attaches part of the intestine to the posterior abdominal wall and allows blood vessels, nerves, and lymphatics to pass between these folds to the intestine

Answer 39

Mesentery

Question 40

Mesenteries (3)

Answer 40

Dorsal mesentary Transverse mesocolon Sigmoid mesecolon

Question 41

Mesentery that suspends the jejunoileum Makes the greater omentum

Answer 41

Dorsal mesentary

Question 42

Connects the transverse colon to the posterior abdominal wall

Answer 42

Transverse mesocolon

Question 43

Attaches the sigmoid colon to the False pelvic cavity

Answer 43

Sigmoid mesocolon