THE VISCERAL CAVITY 13 



3. The Mesenteries 



You should have noted by this time that the viscera are 

 attached to the body wall as well as to each other by deli- 

 cate membranes. These are the mesenteries. Locate the 

 following membranes. 



49. The mesogaster extends from the stomach to the 

 dorsal body wall. 



50. The mesoduodenum stretches from the duodenum 

 to the dorsal body wall. 



51. The mesentery proper is the membrane from the 

 small intestine to the dorsal body wall. 



52. The mesorectum is a corresponding structure from 

 the rectum to the dorsal body wall. 



53. The gastro-hepatic omentum stretches from the 

 stomach to the liver. 



54. The gastro-duodenal omentum extends from the 

 stomach to the duodenum. 



55. The hepato-duodenal omentum connects the liver 

 and the duodenum. 



56. The ventral ligament (mesohepar) is a portion of 

 the embryonic ventral mesentery from the liver to 

 the ventral body wall. 



57. The spleen is a small dark red hacmolymph gland 

 in the mesentery proper. 



Drawing 4. Make a semi-diagTammatic sketch of the 

 digestive system (xl), including the mesenteries, 



4. The Respiratory System 



The larval frog, or tadpole, breathes by means of gills. 

 The adult possesses functional lungs, but also respires 

 through the skin by means of the cutaneous veins and 

 arteries (26). 



