Chapter 08: Body Cavities, Mesenteries, and Diaphragm

Chapter 08: Body Cavities, Mesenteries, and Diaphragm

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

Directions: Each group of questions below consists of a numbered list of descriptive words or phrases accompanied by a diagram with certain parts indicated by letters or by a list of lettered headings. For each numbered word or phrase, select the lettered part or heading that matches it correctly and then insert the letter in the space to the right of the appropriate number. Sometimes more than one numbered word or phrase may be correctly matched to the same lettered part or heading.

________ Derived from intraembryonic coelom

ANS:   E

The peritoneal cavity is derived from the caudal extension of the horseshoe-shaped intraembryonic coelom that forms early in the fourth week of development. In the illustration, the foregut (primordial stomach) is suspended in the peritoneal cavity by the dorsal mesentery (dorsal mesogastrium) and the ventral mesentery (hepatogastric ligament).

________ Ventral mesentery of the stomach

ANS:   A

The ventral mesentery of the stomach develops from the septum transversum and extends from this septum to the ventral aspect of the caudal part of the foregut. This part of the foregut gives rise to the stomach and the superior part of the duodenum. After the liver develops, the ventral mesentery attaches the stomach to the liver (hepatogastric ligament) and the first part of the duodenum to the liver (hepatoduodenal ligament).

________ Caudal part of the foregut

ANS:   B

The endoderm of the caudal part of the foregut gives rise to the epithelium and glands of the inferior end of the esophagus, the stomach, and the superior part of the duodenum. The muscular and fibrous elements of these structures are derived from the surrounding splanchnic mesoderm. The superior part of the foregut gives rise to the pharynx and its derivatives, the lower respiratory tract, and the superior part of the esophagus.

________ Dorsal mesogastrium

ANS:   D

The dorsal mesentery (dorsal mesogastrium) suspends the stomach in the peritoneal cavity. The spleen subsequently develops between the two layers of the dorsal mesogastrium. Later, as the result of positional changes and growth, the dorsal mesogastrium hangs over the transverse colon and small intestine; this part of the dorsal mesentery is the greater omentum.