Mesenteries and the Peritoneum Flashcards
What is a mesentery?
It is a double layer of peritoneum. It is created whenever two sheets of peritoneum meet on the posterior bod wall and then protrude anteriorly to surround an organ.
What are the 3 mesenteric arteries?
Celiac
Superior mesentery
Inferior mesentery
Note: They all travel through the mesentery, along with veins and lymph and nerves.
What does intraperitoneal mean?
Visible mesentery.
What organs are intraperitoneal?
Stomach, liver, spleen, 1st and 4th parts of the duodenum, jejunum, ileum, appendix, transverse colon, and sigmoid colon)
What does secondarily retroperitoneal mean?
Began as intraperitoneal, but it got squished back to the posterior body wall. It still has a mesentery, but its not as visible now.
What organs are secondarily retroperitoneal?
2nd and 3rd parts of the duodenum, pancreas, ascending/descending colon, and rectum.
What does primarily retroperitoneal mean?
Organs that never had a mesentery to begin with. They are usually hidden behind the peritoneum as a result.
What organs are primarily retroperitoneal?
Kidneys, suprarenal glands, ureters, and all pelvic viscera.
Note:
AKA kidneys and all associated organs.
What is the omental bursa also known as?
Lesser sac, found posterior to the liver and stomach.
What is the peritoneal cavity also known as?
Greater sac.
What connects the omental bursa and peritoneal cavity?
The gastro-omental foramen. It is found in between the portal triad in the hepatoduodenal ligament and the IVC.
What connects the liver to the stomach?
Lesser omentum
What is found on the posterior part of the omental bursa?
Pancreas
What is found on the inferior border of the omental bursa?
Transverse colon
