Lecture 25: peritoneum and mesenteries Flashcards Preview

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Flashcards in Lecture 25: peritoneum and mesenteries Deck (42):
1

Peritoneal cavity

Below diaphragm, surrounded by abdominal wall and pelvic floor. Enclosed in peritoneum

2

Components of peritoneum

Parietal and Visceral peritoneum

3

Serous fluid

Between visceral peritoneum, allows frictionless movement of the organs against each other

4

Mesentary

Double sheet of connective tissue attaching the organs to the abdominal wall

5

mesogastrium

Mesentary connecting to the stomach

6

mesos root

Latin for middle

7

enteron latin root

guts, intestine

8

gaster latin root

belly

9

hepar

means liver in latin

10

lien

means spleen in latin

11

How do the liver, stomach, pancreas and spleen move during embryological rotation?

The liver and stomach rotate to right, the spleen and pancreas to the left.

12

How many layers to greater omentum?

Six-where the transverse mesocolon attaches
Four - in the gastrocolic portion, because a double layer folded in on itself
Two- in gastrophrenic/gastrolienal portions

13

Parietal peritoneum

secondary mesentaries that are not active in suspending the gut

14

Purpose of greater omentum

Bind against the stomach, stop infections from spreading, then a site for fat storage

15

falciform latin

sickle shaped

16

teres latin

round

17

phrenic latin

diaphragm

18

connection between the greater and lesser sac

epiploic/omental foramen, sits under the hepaduodenal ligament

19

Components of lesser omentum

hepatogastric and hepatoduodenal ligaments

20

Components of greater omentum

Gastrolienal, gastrocolic, gastrophrenic

21

Contained within the hepatoduodenal ligament

Common bile duct, portal vein, hepatic artery

22

ventral mesentary

Present embryologically, gives rise to ventral mesogastrium which is attached to liver : hepatoduodenal ligament, hepatogastric ligament, triangular ligaments, coronary ligaments, falciform ligaments

23

dorsal mesentary

Present embryologically, gives rise to dorsal mesogastrium, "the mesentary", mesentaries of large intestine

24

Dorsal mesogastrium

Made of:
greater omentum: gastrophrenic, gastrolienal, gastrocolic
Adult transverse mesocolon (anterior lamina/side)
Lienorenal or phrenicolienal

25

"the mesentary"

of the small intestine

26

mesentaries of large intestine

adult transverse mesocolon (posterior lamina/side)
sigmoid mesocolon
mesoappendix

27

How do the intestines rotate embryologically

First grow straight, then herniate into umbilical cord, then rotate within umbilical cord space (which creates the small intestine crossing over the transverse colon), and then squishes back into abdominal space (this creates the waves in the small intestine)

28

greater sac vs. lesser sac

greater sac = peritoneal sac
lesser sac = omental bursa. The lesser omentum makes up a wall of the lesser sac. The same does not hold for the greater omentum

29

ligament

A gut suspender that is not a mesentary

30

Suspensary ligament of duodenum

Two muscles. One (smooth) suspends from duodenum, the other (striated) attaches to diaphragm.

31

phrenicocolic ligament

spleen rests on it, closely associated to dorsal mesogastrium

32

broad ligament of uterus

mesometrium --> uterus
mesosalpinx --> uterine tubes
mesovarium --> ovaries

33

metro

uterus

34

salpinx

trumpet

35

infundibulopelvic or suspensory ligament of ovary

Contains vessels, but not the round ligament of ovary

36

tunica vaginalis comminus

peritoneal folding on testes

37

vesicouterine pouch

Sits between uterus and the bladder, site where infections can develop in female.

38

rectouterine pouch

Sits between uterus and the rectum, site where infections can develop in female.

39

recto vesicle pouch

Sits between rectum and bladder --> infections.
Male

40

Paracolic gutters

Sit to either side of ascending and descending colon.

41

Paramesenteric gutters

between small intestines and the colon

42

Infrahepatic or hepatorenal pouch

Most dorsal when bed-ridden. Communicates through omental bursa