Unit III: Body Cavities

Question 1

Divisions of the intraembryonic coelom

Answer 1

1. 1 pericardial cavity
2. 2 pericardioperitoneal canals
3. 1 peritoneal cavity

Question 2

Parietal walls are covered with ___ mesoderm

Answer 2

Somatic

Question 3

Visceral walls are covered with ___ mesoderm

Answer 3

Splanchnic

Question 4

2 sets of folds in the lateral walls of the intraembryonic coelom

Answer 4

1. pleuroperdial

2. pleuroperitoneal

Question 5

What does the diaphragm develop from?

Answer 5

1. septum transversum
2. pleuroperitoneal membrane
3. dorsal mesentery of the esophagus
4. muscle of the lateral walls

Question 6

At what somite level does the septum transversum lie at 4 weeks?

Answer 6

3rd-5th

Question 7

Which nerve fibers form the phrenic nerve?

Answer 7

C3-C5

Question 8

What is congenital diaphragmatic hernia?

Answer 8

Hole that allows abdominal organs to enter the thoracic cavity