Intro to Alimentary system and anatomy overview Flashcards Preview

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What is the abdominal cavity lined with?

Lined with peritoneum, a serous membrane


How many regions is the abdominal cavity divided into?



What is the peritoneum?

It is a single cell thick serous (lubricated) layer

- It has visceral and parietal layers


What does retroperitoneal mean?

Situated or occurring behind the peritoneum

E.g. rest of the duodenum, ascending colon, descending colon, middle 3rd of rectum, remainder of pancreas.


What does intraperitoneal mean?

Within or administered through the peritoneum


What is the difference between intraperitoneal and retroperitoneal?

Structures that are intraperitoneal are generally mobile

While retroperitoneal structures are relatively fixed to their location


What is a mesentary?

A mesentery is a double layer of peritoneum that occurs as a result of the invagination of the peritoneum by an organ and constitutes a continuity of the visceral and parietal peritoneum


What is an omentum?

An omentum is a double-layered extension of peritoneum
passing from the stomach and proximal part of the duodenum to adjacent organs


What is the greater omentum?

The greater omentum extends superiorly, laterally to the left, and inferiorly from the greater curvature of the stomach and the proximal part of the


What is the lesser omentum?

The lesser omentum connects the lesser curvature of the stomach and the proximal part of the duodenum to the liver


What is a peritoneal fold?

It is a reflection of peritoneum that is raised from the body wall by underlying blood vessels, ducts, or obliterated fetal vessels or ducts


What is a peritoneal recess (or fossa)?

It is a pouch or concavity formed by a peritoneal fold


How do arterial branches gain access to peritonised organs?

They travel between double folds of peritoneum, such as mesenteries and omenta


What is the short 'neck' that links the two sacs of the peritoneal cavity called?

The epiploic foramen

- These are the greater and lesser (omental bursa) sacs


What is another nam e for the lesser sac?

Omental bursa


What are the 4 planes that divide the 9 regions of the abdominal cavity?

Subcostal plane - passing through he inferior border of the 10th costal cartilage on each side

Transtubercular plane - passing through the iliac tubercles and the body of the L5 vertebra

Midclavicular planes - passing from the midpoints of clavicles to the midinguinal points ,


What are the 5 (bilaterally paired) muscles in the anterolateral abdominal wall?

External oblique

Internal oblique

Tranversus abdominus

Rectus abdominus