Intro to the Alimentary system

Question 1

What structure separates the thoracic cavity from the abdominal cavity ?

Answer 1

The diaphragm

Question 2

What structures penetrate the diaphragm from anterior to posterior ?

Answer 2

IVC
Oesophagus
Aorta

Question 3

Which structure goes through the central tendon of the diaphragm ?

Answer 3

The IVC

Question 4

What are the two muscles that attach to the spine and sit on the posterior aspect of the abdominal wall?

Answer 4

Psoas minor and Psoas major

Question 5

Which muscle in the posterior abdominal wall allows for stability of plexuses, lymphatic drainage ?

Answer 5

Psoas major

Question 6

What muscle lies within the illiac crest and goes down to the hip joint ?

Answer 6

Illiacus

Question 7

Which muscle stabilizes the lumber region of the spine ?

Answer 7

Quadratus Lumborum

Question 8

What is the peritoneum ?

Answer 8

A thin single cell layer of squamous cell epithelium

Question 9

What are the two layers of peritoneum ?

Answer 9

Visceral and parietal

Question 10

Which layer of the peritoneum covers the abdominopelvic wall ?

Answer 10

Parietal

Question 11

Which layer of the peritoneum covers the organs ?

Answer 11

Visceral

Question 12

What is the space between these layers called and what is found there ?

Answer 12

Peritoneal cavity and peritoneal fluid

Question 13

Where is the lesser sac found ?

Answer 13

Posterior to the stomach

Question 14

What are the three ways that organs can be arranged in the abdominal cavity and what do they mean?

Answer 14

Peritonised: surrounded by peritoneum
Retroperitonised: Stuck to the posterior abdominal wall and partly covered in peritoneum.
On a mesentery: A fold on the peritoneum

Question 15

How do lymphatics within the mesentery drain ?

Answer 15

posteriorly to the pre-aortic nodes