GI Lab Worksheets Flashcards

0
Q

When the anterior abdominal wallis opened, and the contents of this cavity are viewed, what “sac” have you entered?

A

Greater sac

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1
Q

Which parts of GI tract are intraperitoneal and which are retroperitoneal?

A

Intra: duodenum (1st and 4th segment), stomach, jejunum, ileum, transverse and sigmoid colon

Retro: duodenum (2nd and 3rd part), ascending and descending colon, and rectum

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2
Q

When you place your fingers through the epiploic foramen you have entered which sac?

A

Lesser sac

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3
Q

What are the boundaries of the epiploic foramen?

A

Anterior - hepatodouadnal ligament containing the portal triad
Posterior - inferior vena cava and right crus of diaphragm
Superior - liver
Inferior - duodenum

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4
Q

Where is the portal triad located, and what vessels does it contain?

A

Hepatoduodnal ligament

Contains: common bile duct, portal vein,and proper hepatic artery

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5
Q

Which primary GI system artery arises most superiorly, and what are it’s three initial branches? What part of the gut does it supply?

A

Celiac trunk

Common hepatic, left gastric, and splenic

Upper GI/foregut

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6
Q

Which primary GI system artery arises most inferiorly, and what are it’s primary branches? What part of the gut does it supply?

A

Inferior mesenteric

left colic, sigmoid, and superior rectal

Descending colon and superior rectum/hindgut

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7
Q

What primary GI artery supplies the small intestine, cecum, ascending and transverse colon, and what are it’s primary branches?

A

Superior mesenteric

Iliocolic, right colic, and middle colic

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8
Q

What is the course of blood from the celiac trunk to the liver?

A

Common hepatic –> proper hepatic –> right and left hepatic

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9
Q

What is teh course of blood from the celiac trunk to the stomach?

A

left gastric –> stomach

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10
Q

Which vessels converge to form the portal vein?

A

Splenic vein (from lower GI) and superior mesenteric vein

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11
Q

Caput medusae are caused by what portion of the postocaval anastomotic system?

A

Back up of blood flow from the liver, so it does to umbilical vein –> SVC and IVC. Common in alcoholics

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12
Q

What are the two primary types of hiatal hernias, and how do they differ?

A

Sliding - all of stomach can be involved

Paraesophageal - only the fundus of the stomach is next to the esophagus

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13
Q

What are the differences between jejunum and ileum?

A

Jejunum - simple archades, long vasa recta, dense plicae circularis, and responsible for most of the absorption in the GI tract

Ileum: compound vasculature arcade, short vasa recta, fewer plicae circularis

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14
Q

What are the components of the large intestine?

A

Cecum, ascending, transverse, descending, sigmoid, and rectum

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15
Q

How can you tell the large and small colon apart?

A

Large - taenia coli (thick packing tape around colon), epiploic appendices (fat tags), semilunar folds inside, housetrays, and pockets

Small - smooth

16
Q

How many lobes does the liver have, and what are their names?

A

Four lobes

Right, left, quadrate (more square than codate), and codate

17
Q

What are the round, falciform, and coronary ligaments? Where are they found, and what are they the embryologic remnants of? What is the last hepatic ligament not mentioned, and where is it located?

A

Round - aka. ligamentum teres hepatis. Thickening at the bottom of faciform. Remnant of the umbilical vein, continuous with ligamentum venosum (remnant of ductus venosus)
Falciform - at hilum of liver, connects liver to anterior wall. Remnant of umbilical vein.
Coronary - peritoneal reflections that hold the liver to the inferior surface of the diaphragm. Dorsal to falciform ligament.

Triangular ligament - on either side of coronary ligament.

18
Q

What is the flow of bile through the bile duct system?

A

Stored in liver –> right and left hepatic ducts for secretion —> common hepatic duct –> cystic duct –> common bile duct –> duodenum

19
Q

What are the contents of the foregut?

A

Stomach, liver, gallbladder, pancreas, spleen, and first 1/2 of duodenum

20
Q

What are the contents of the midgut?

A

Second 1/2 of duodenum, jejunum, ileum, cecum,ascending colon, and 2/3 of transverse colon

21
Q

What are the contents of the hindgut?

A

Left 1/2 of transverse colon, descending colon, sigmoid colon, and rectum

22
Q

What are the parts of the duodenum, and what are the unique features of each?

A

Superior - where hepatoduodnal ligament (contains portal triad) attaches to lesser omentum
Descending - where bile and pancreatic ducts empty
Inferior - crosses inferior vena cava and aorta, is crossed anteriorly by mesenteric vessels
Ascending - portion tethered by suspensory ligament at duodenojejunal flexure

23
Q

What are the mesenteries of large intestine components?

A
Ascending - retroperitoneal
Transverse colon - transverse mesocolon 
Descending colon - retroperitoneal 
Sigmoid colon - sigmoid mesocolon 
Rectum - retroperitoneal
24
Q

What are the primary differences between the internal and external anal sphincters?

A

Internal -involuntary, smooth muscle, parasympathetic innervation
External- voluntary, skeletal muscle, somatic innervation

25
Q

How do you differentiate the lobes of the liver?

A

1) Right lobe - largest lobe
2) Quadrate lobe - between gallbladder and round ligament of liver
3) Caudate lobe - between the IVC, ligamentum venosum, and porta hepatis
4) Left lobe

26
Q

What is the bare area of the liver?

A

Area pressed against diaphragm that lacks visceral peritoneum

27
Q

What is the porta hepatis?

A

Site at which vessels, ducts, lymphatics, and nerves enter and leave the liver

28
Q

Journey of bile after secretion by hepatocytes?

A

Passes into canaliculus (capillary) –> intralobar ductules –> bile ducts –> collects in right and left hepatic ducts –> common hepatic duct –> cystic duct where it is stores and concentrated in the gall bladder –> vagal efferent stimulation by CCK moves bile out of gallbladder –> inferiorly down common bile duct –> hepatopancreatic ampulla –> empties into second part of duodenum