Esophagus, stomach, duodenum Flashcards Preview

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Flashcards in Esophagus, stomach, duodenum Deck (32):
1

Where dos the esophagus enters the abdomen?

right crus of diaphragm

2

What is the physiologic esophageal sphincter?

a circular layer of smooth muscle at the terminal end of the esophagus

3

What is the esophageal sphincter function?

the contraction prevents the contents of the stomach from regurgitating

4

What forms the esophageal sphincter?

The gastroesophageal funtion, diaphragm musculature

5

Where is the location of the stomach?

left hypochondriac & epigastric region
supine position on stomach bed

6

What is the stomach covered by?

entirely by the peritoneum

7

What are the four regions of the stomach?

cardia
fundus
body
pylorus

8

What is a pylorus?

region of stomach that connects to the duodenum.

9

What are the parts of the stomach?

greater and lesser curvatures,
anterior/posterior walls
cardiac & pyloric openings
cardiac & angular notches

10

What is the cardia?

part of the stomach that attaches to the esophagus

11

What is the fundus?

left portion of stomach body
marked of by plane passing through cardiac orifice
allows storage of gases produced by chemical digestion

12

What is the division of the pylorus?

pylorus Antrum
pyloric canal

13

What is the pylorus sphincter?

circular smooth muscles that control the rate of discharge of contents into the duodenum

surrounds the pylorus

14

What controls the pylorus sphincter?

Sympathetic - constricts
parasympathetic - relaxes

15

What are the arteries of the stomach?

Right/left gastric
right/left gastropiploic (gastroomental)
short gastric

16

What are gastric rugae?

folds in stomach that provide stomach with extra surface area for food absorption

17

What is the gastric canal?

Formed by the ragae,
directs fluids to the pylorus
grooved channel of lesser curvature

18

What does the stomach produce?

Hydrochloric acid- destroys bacteria
pepsin- breaks down protein

produced in body and fundus

19

What does the pyloric antrum produce?

gastrin - stimulates gastric acid secretion

Parasympathetic fibers in vagus stimulate gastric secretion

20

Describe the duodenum?

C-shaped tube surrounding the head of the pancreas
smallest but widest part of intestine s

21

What is connects the duodenum to liver?

heptaduodenal ligament of the lesser omentum

22

What are the arteries of the duodenum?

Celiac(foregut)
Superior mesenteric (midgut)

23

What are the parts of the duodenum?

Superior
descending
transverse
ascending

24

Describe the superior duodenum.

duodenal cap. has mobile free section
retroperitoneal (except first part)
pylorus invaginates into

25

Describe the descending part.

contains junction of the foregut & midgut (common bile duct and main pancreatic ducts open)

26

What does the descending part contain.

greater papilla - termianl openings of bile duct and main pancreatic ducts

lesser papilla- lies 2cm above greater papilla, site of entry for main pancreatic duct

27

Describe the transverse part

longest part

28

what lies behind the transverse part?

IVC, aorta

vertebral column lies to the left

29

What crosses the transverse part anteriorly?

superior messenteric vessels

30

locate the ascending part

left to the aorta at the second lumbar vertebrate

31

Where does the ascending part terminate?

duodenojejunal junction

32

What is the suspensory ligament of treitz?

connects the right part of the duodenum to the right crus of the diaphragm