300 



ZOOTOMY. 



and connected by the renal artery and vein with the aorta 

 and inferior cava respectively (see §§ 253 and 254). 



188. The left ureter, a dehcate white tube, passing from 

 the inner edge of the kidney backwards and inwards towards 

 the pelvis : its exact relations will be studied later (§ 262). 



189. The left adrenal or suprarenal body, a small, 

 rounded, yellowish body, placed immediately anterior to the 

 origin of the renal artery and vein. 



190. In the female the left uterus, Fallopian tube, 

 and ovary are now displayed, but are best studied at a later 

 stage (§§ 288-291). 



191. The posterior mesenteric artery {p.m.a), a 

 small vessel leaving the aorta a short distance posterior to 

 the left kidney and branching out in the mesorectum to 

 supply the rectum. 



192. The posterior mesenteric vein (Fig. 60, p.m.i), 

 a small vessel in the mesorectum formed by the union of 

 branches parallel with those of the artery of the same name : 

 it passes directly forwards to join the anterior mesenteric 

 vein (§ 193). 



XIX. Turn the intestines over to the animal's left side, 

 and spread out the duodenum, putting its mesen- 

 tery slightly on the stretch, but taking care not to 

 rupture it (see Fig. 60). Note : 



193. The anterior mesenteric vein {tn.ii), a large 

 vessel usually gorged with blood after death, lying in the 

 duodenal mesentery and receiving veins from the various 

 coils of the intestine ; it is the chief factor of the portal 

 vein (§ 199). 



194. The pancreas {pn), not forming a solid mass, but 

 consisting of a number of small lobules, looking not unlike 

 fat, spread all over the duodenal mesentery. 



195. The pancreatic duct {pn.d), a short delicate tube, 



