Abdominal & Peritoneal Cavity

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Extent of abdominal cavity
- 4^th intercostal space
- Pelvic inlet
What lines the abdominal cavity?

Parietal peritoneum
Origin of greater omentum

Derived from developing dorsal mesentery
Origin of lesser omentum

Derived from developing ventral mesentary
Lateral mesoderm splits into:
- Somatic mesoderm
- (Forms parietal peritoneum)
- Splanchnic mesoderm
- (Forms CT / gut m. / visceral peritoneum)
Mesentaries are formed by _______

2 layers of splanchnic mesoderm (visceral peritoneum)
Mesothelium

Lining of squamous cells in the peritoneum that secrete a serous fluid
What forms the mesenteries, omenta, and abdominal ligaments?

Visceral peritoneum
Viscera are found _______ the abdominal cavity and ______ the peritoneal cavity
- Within abdominal cavity
- Outside peritoneal cavity
Intraperitoneal organs are surrounded or nearly surrounded by _______ peritoneum

Visceral
How are retroperitoneal organs covered?

Covered by peritoneum on their anterior surface only
How do organs become secondarily retroperitoneal

Organs lose their mesenteries during development and are pushed against posterior body wall
Blood supply / innervation of parietal peritoneum

Same as the body wall
Blood supply / innervation to the visceral peritoneum

Same as the organs it invests
Suspends liver from diaphragm

Ant. / Post. Coronary ligament
Divisions of peritoneal cavity
- Greater sac
- Lesser sac (omental bursa)
Opening into the omental bursa

Epiploic foramen (foramen of winslow)
Posterior wall of epiploic foramen

IVC (peritoneally-covered)
Anterior wall of epiploic foramen

Hepatoduodenal ligament
Hepatogastric ligament
- Forms lesser omentum
- Bounded laterally by hepatoduodenal ligament
Gastrocholic ligament

Forms greater omentum
Hepatoduodenal ligament
- Doorway to omental bursa
- Contains the portal triad
Gastrolienal ligament
- (gastrosplenic ligament)
- Attaches spleen to the stomach
- Contains BVs that go from the splenic a. into greater curve of stomach
Lienorenal ligament
- (splenorenal ligament)
- Attaches spleen to left kidney
Where would fluid released from pancreatitis or stomach ulcer collect? Why?
- Omental bursa
- Pancreas is behind the lesser omentum
Adult remnants of the ventral mesentary
- Falciform ligament (contains ligamentum teres of liver)
- Lesser omentum (free margin is hepatoduodenal ligament)
Adult remnants of the dorsal mesentary
- Greater omentum
- - gastrocholic ligament
- - gastrolienal ligament
- - Lienorenal ligament
- Mesentary proper - of small intestines
- Sigmoid mesocolon

Author

mnm2186

35180

Card Set

Abdominal & Peritoneal Cavity

Description

Exam 3

Updated

2010-09-19T22:50:55Z

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