Mesenteries and the Peritoneum Flashcards

1
Q

What is a mesentery?

A

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.

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2
Q

What are the 3 mesenteric arteries?

A

Celiac
Superior mesentery
Inferior mesentery

Note: They all travel through the mesentery, along with veins and lymph and nerves.

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3
Q

What does intraperitoneal mean?

A

Visible mesentery.

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4
Q

What organs are intraperitoneal? 8

A

Stomach, liver, spleen, 1st and 4th parts of the duodenum, jejunum, ileum, appendix, transverse colon, and sigmoid colon)

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5
Q

What does secondarily retroperitoneal mean?

A

Began as intraperitoneal, but it got squished back to the posterior body wall. It still has a mesentery, but its not as visible now.

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6
Q

What organs are secondarily retroperitoneal?

A

2nd and 3rd parts of the duodenum, pancreas, ascending/descending colon, and rectum.

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7
Q

What does primarily retroperitoneal mean?

A

Organs that never had a mesentery to begin with. They are usually hidden behind the peritoneum as a result.

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8
Q

What organs are primarily retroperitoneal?

A

Kidneys, suprarenal glands, ureters, and all pelvic viscera.

Note:
AKA kidneys and all associated organs.

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9
Q

What is the omental bursa also known as? Where is it found?

A

Lesser sac, found posterior to the liver and stomach.

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10
Q

What is the peritoneal cavity also known as?

A

Greater sac.

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11
Q

What connects the omental bursa and peritoneal cavity?

A

The gastro-omental foramen. It is found in between the portal triad in the hepatoduodenal ligament and the IVC.

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12
Q

What connects the liver to the stomach?

A

Lesser omentum

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13
Q

What is found on the posterior part of the omental bursa?

A

Pancreas

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14
Q

What is found on the inferior border of the omental bursa?

A

Transverse colon

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