LATERAL DISSECTIONS OF THE VISCERA 



off ventralwards, exposing the myelencephalon and cervical portion of the cord. As the 

 mesenchyma is pulled away, the ganglia and roots of the cerebral nerves will be exposed. 

 The mesenchyma between the ganglia and along the nerves may be removed with the end 

 of a small blunt needle. Care must be exercised in working over the mesencephalon and 



Semilunar ganglion n. 5 Ophthalmic ramus n. 5 

 Gang, geniculi n. 7 \ I Cerebrum 



Mesencephal 

 Cerebellum 



Gang, acusticum n. 8 

 Gnag. superius n. 



Gang, jugulare n. 10 



Gang. Freriep 



Auricular r. n. 10 



Gang. n. cerv. I 



Gang, petrosum n. 



N. accessorius 



N. hypoglossus 



Gang. cerv. 5-8 



Gang. thor. I 



Lung 



Diaphragm \ 



Dorsal lobe of liver 

 Mesonephros 



Hypophysis 



N. opticus 



Lobus olfactorius 



Maxillary ramus n. 5 



Mand. ramus n. 5 

 Chorda tympani n. 7 



N. facialis 



Gang, nodosum n. 10 



R. atrium 

 R. ventricle 



Ventral lobe of liver 

 Umbilical cord 

 Lower limb 



Sciatic nerve 



Metanephros' 



Lumbar gang. 



Nerve to lower limb 



FIG. 145. Lateral dissection of a 35 mm. pig embryo, to show the nervous system and viscera 

 from the right side. X 4. 



telencephalon of the brain not to injure the brain wall, which may be brittle. By starting 

 with a clean dissection dorsally and gradually working ventrad, the more important organs 

 may be laid bare without injury. The beginner should compare his specimen with the 

 dissections figured and also previously study the reconstructions of Thyng (1911) and Lewis 

 (1903). 



