564 



URINARY ORGANS OF THE OX 



The lymph-vessels go to the renal l^-mph glands. The numerous nerves are derived 

 from the sympathetic system through the solar and renal plexuses. The fibers 

 form a rich interlacement, especially in the medullary substance. Ganglion cells 

 are foimd chiefly in the medulla, but also occur in the deeper part of the cortex. 



URINARY ORGANS OF THE OX 



The kidneys are superficially divided into polygonal lobes by fissures of vari- 

 able depth. The lobes vary in size, and are commonly about twenty in number. 

 The fissures are filled with fat. 



The right kidney has an elongated elliptical outline, and is flattened dorso- 

 ventrally. It commonly lies ventral to the last rib and the first two or three lumbar 



External border 



Anterior extremity 



Ureter Renal artery 



Fig. .504. — Right Kidney of Ox; Ventral Face. 

 Organ hardened in aitu. Fat has been removed from fissures between lobes. 



Renal artery 



Fig. 505. — Fhoxtal Section of Kidxet of Ox. 

 I/, Lobes of cortex; P, papillse; C, calyx major; c', calyces minores. 



transverse processes, but its extremities may be ventral to the first and fourth 

 lumbar transverse processes. The dorsal surface is rounded, and is in contact 

 chiefly with the sublumbar muscles. The ventral surface is less convex, and is 

 related to the liver, pancreas, duodenum, and colon. The hilus is situated on the 

 anterior part of this surface, near the medial border. The medial border is 

 nearly straight, and lies parallel with the posterior vena cava. The lateral border 

 is convex. The anterior extremity occupies the renal impression of the liver, and 

 is capped by the adrenal body. 



