Lecture 25: Mesenteries- Peritoneal Reflections Flashcards Preview

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Flashcards in Lecture 25: Mesenteries- Peritoneal Reflections Deck (80):
1

peritoneal cavity

a space, filled with organs

2

layers of peritoneum

parietal (on the wall), visceral (on the organ)

3

characteristic of visceral peritoneum

lubricated by serous fluid, allows frictionless movement of organs

4

type of space peritoneum is

potential

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bursae

sacs created during organogenesis/movement,due to mesenteries folding

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mesentery

double sheet of connective tissue, has blood vessels, connects organs to abdominal wall

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megogastrium

mesentery attaching to stomach region

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"mesos"

middle

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"enteron"

guts, intestine

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"gaster"

belly (i.e. "stomach")

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dorsal mesentery

dorsal mesogastrium + mesentery

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ventral mesentery location

area that'll become stomach

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"hepar"

liver

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"lien"

spleen

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"ren"

kidney

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"pancreas"

pancreas

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"epiloon"

= "omenum" = fatty skin/apron

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hepatoduodenal ligament

liver-duodenum

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gastrohepatic ligament

connects hepato duodenal ligament and stomach

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gastrolienal ligament

connects stomach-spleen

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lienorenal ligament

connects spleen-pancreas

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omentum / epiploic foramen

entrance into lesser sac

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organs that form out of gut tube

liver, spleen, pancreas, stomach

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falciform ligament

dolphin/sickle shaped ligament

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"teres"

round

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"phren"

diaphragm

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derivation of falciform ligament

ventral mesogastrium

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hepatogastric ligament derivation

dorsal mesogastrium

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greater omentum

binds against stomach; holds infections in place

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where greater and lesser omentum bind

lesser sac

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LARP

left vagus: anterior (to esophagus); right vagus: posterior (to esophagus)

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order of intestinal folding

straight; herniate; rotate; squish(ilate)

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what goes with intestinal mesentery during rotation

nerve supply

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lesser sac aka

omental bursa

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greater sac

peritoneal sac

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epiploic/omental foramen function

communicates between lesser and greater sacs

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intraperitoneal

completely enclosed in visceral peritoneum

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intraperitoneal structures

liver, gall bladder, spleen, stomach, 1st part of duodenum, jejunum, ileum, vermiform appendix, transverse colon, sigmoid colon

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primarily retroperitoneal

anterior surface covered by parietal peritoneum - no gut rotation, so posterior/dorsal to peritoneum

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primarily retroperitoneal structures

kidney, adrenal, inferior vena cava, aorta, testis

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secondarily retroperitoneal

adherent to posterior peritoneal wall

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secondarily retroperitoneal structures

2nd 3rd 4th parts of duodenum, cecum, ascending colon, descending colon, rectum, pancreas

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extraperitoneal

outside peritoneum, but not posterior or dorsal

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extraperitoneal structures

urinary bladder, prostate, seminal vesicles, uterus, ovary

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derivatives of ventral mesentery

ventral mesogastrum - lesser omentum (hepatoduodenal, hepatogastric), falciform, coronary, right triangular, left triangular

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hepatoduodenal ligament contains

portal vein, hepatic artery, bile duct

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obligterated umbilical vein is

ligamentum veres hepatis, falciform ligament

48

dorsal mesentery derivatives

dorsal mesogatrum, mesentery of small intestine, mesenteries of large intestine (colon)

49

dorsal mesogastrum derivatives

greater omentum, adult transver mesocolon, lienorenal or phrenicolineal ligament

50

greater omentum derivatives

gastrophrenic (stomach-diaphragm); gastrolienal (stomach-spleen); gastrocolic (stomach-transverse colon)

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mesenteries of large intestine- derivatives

transverse mesocolon, sigmoid mesocolon, mesoappendix

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upper/superior recess location

within lesser omentum

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lower/inferior recess location

within greater omentum

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what does lesser omentum attach to

lesser curvature of stomach; forms part of lesser sac walls

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what does greater omentum attach to

greater curvature of stomach; but NOT THE GREATER SAC

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layers of greater omentum

2 layers in gastrophrenic/gastrolineal portions

4 layers in gatrocolin portion (double layer, folded on itself)

6 layers where embryonic transverse mesocolon (2 layers) adheres

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parietal peritoneum derivatives

secondary mesenteries

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ligament

any suspender not called a "mesentery"- usu peritoneal folding containing blood vessels, unrelated to embryonic gut suspension

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suspensory ligament of duodenum

aka ligament of Treitz

2 muscles- straited from diaphragm, smooth from duodenum

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phrenicocolic ligament

spleen "rests" on it; closely assoc w/ dorsal mesogastrium

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broad ligament of uterus

mesometrium (uterus), mesosalpinx (uterine tubes), mesovarium (ovaries)

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infundibulopelvic or suspensory ligament of ovary

contains vessels, NOT ovarian/round ligament

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tunica vaginalis communis

distal part of processus vaginalis, wraps around testis

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"metrium"/"metro"

uterus

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"salpinx"

trumpet

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"ovarium"

ovary

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pouches/recesses

most inferior points when recumbent or standing, infection can spread

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male peritoneal pouch/gutter

rectovesical

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female peritoneal pouches/gutters

rectouterine, vesicouterine

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space between liver, kidney

hepatorenal pouch

infections can pool here, esp in bedridden person

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paracolic gutters

lateral to ascending colon and descending colon

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right lateral paracolic gutter

connects pelvis and hepatorenal pouch

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left lateral paracolic gutter

limited superiorly by prenicocolic ligament

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paramesenteric gutters

between small intestine and colon

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left paramesenteric gutter

communicates w/ pelvis

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right paramesenteric gutter

limited by surrounding mesenteries

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infrahepatic or hepatorenal pouch/recess

most dorsal point when recumbent, infection can spread here, communicates w/ omental bursa

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vermiform appendix

was at level of gut during umbilical herniation/rotation

sympathetic innervation: T10

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left colic (splenic) flexure importance re: parasympathetic innervation

vagus innervates proximally; pelvic splanchnics innervate distally

80

all peritoneal pouches/gutters

rectovesical, rectouterine, vesicouterine pouches; paracolic gutters; paramesenteric gutters; infrahepatic or hepatorenal pouch/recess