Peritineal Cavity

1) Association

2) Composition

1) Associated with abdominopelvic cavity

2) Serous Membrane: visceral and parietal

Typical Organ of Digestive System in Abdominal Cavity

4 layers

ANS Plexi (2) and locations

1) Mucosa: epithelium lining lumen of structure

2) Submucosa: connective tissue layer

3) Muscularis: layers of smooth muscles, inner circular and outer longitundinal

4) Serosa: visceral peritoneum composed of outer epithelium (specifically ¨mesothelium¨) & inner connective tissue

Myenteric Plexus (plexus of auerbach)- btwn muscle layer= inner circular and outer longitudinal layers

Autonomic Plexus in submucosa innervates glands and mucous membranes

Mesentary

1) Definition and composition

2) Three functions of ¨double layer¨

1) A group of structures formed by serosa.  Composed of serous membrane and outer double layer.

2) Fat storage, organ support (limit organ movement), neurovascular bundle support (run btwn mesentary)

Parietal Peritoneum

Visceral Peritoneum

What is in between?

Lines cavity wall

Surrounds organs

Mesentary derived from peritoneum anchors organs to abdominal walls, neither visceral or parietal, just peritoneum (both).

All continuous

Intraperitoneal Organs

Define and List

 12

Retroperitoneal Organs

Define and list

 15

Structures posterior or inferior to the

Parietal Peritoneum.  Not completely surrounded.

Duodenum, Asc colon, desc colon, rectum, pancreas, suprarenal gland, kidney, ureter, urinary bladder, aorta, IVC, vagina, prostate gland, seminal vesicle

**Fixed structures: without mesentery**

1) Lesser Peritineal Sac/Cavity

2) Greater Peritineal Sac/Cavity

Locations in relation to stomach?

3) Communication?

1) Posterior to stomach

2) Broader, larger, anterior and inferior to stomach

3) Greater and lesser sacs make up one space (pt of communication not observed (at midline) in a midsagital cut, only can see it in a transverse cut): each is a subdivision of peritineal cavity.

Define these abdominal cavity mesenteries:

1) The Mesentery

2) The transverse mesocolon

3) Lesser omentum

4) Greater omentum

1) Supports some 20' of Jejunum and Ileum (connects to the posterior Parietal Peritoneum)

2) supports transverse colon (connects to the posterior Parietal Peritoneum)

3) mesentary that anchors stomach to liver, attached to lesser curve of stomach

4) Large structure suspended from stomach and transverse colon; continuation of serous membrane surrounding these two organs; forms apron draping over majority of intestine

Communication between Greater and Lesser Peritoneal Cavities observed in what sectional cut?

not in what cut

1) Visualized in transverse cut.

2- midline cut

Anchors liver to anterior wall of abdominal cavity.

Intraperitoneal

Posterior= hepatic portal vein

L=Common hepatic artery

R=common bile duct

Epiploic or Omental Foramen

Posterior boundary

Communication between the greater and lesser peritineal sacs.

Posterior boundary= inferior vena cava

Lesser omentum

1) function

2)2 subdivisions

3) special feature? In what subdivision?

1) Attaches stomach to liver

2) Medial part is hepatogastric (stomach-liver) ligament

Lateral part with free edge attched to initial part of duodenum: hepatoduodenal ligament

3) Portal triad: hepatic a., bile duct, portal vein.  In hepatoduodenal ligament

Greater Omentum

Suspended from?

Lessor Omentum

route?

what is posterior?

what boundary does it form?

Greater curve of the stomach and the transverse colon

-comes from Lesser curve of stomach to liver.

-epiploic space

-lesser Omentum + stomach forms anterior boundary of lesser peritoneal cavity

1) Supracolic & Infracolic sacs

2) Omental bursa

1) Subdivisions of greater sac.

-supracolic is anterior and superior to the transverse colen

-inferior to transverse colen and its mesentary

2) Lesser sac

-posterior  to stomach and lesser omentum

Root of the mesentery

1) What is it?

2) Compartments: superior, inferior, lateral, subcompartments

Attachment of colic mesentery to posterior abdominal wall.  Supports 20´ of bowel(jejunum and illium).

-Superior to transverse colon= supracolic. 

-Inferior to transverse colon=infracolic (R & L Infracolic space subcompartments).

Lateral to infracolic spaces= L & R paracolic gutter