64 



DISSECTION OF THE DOG 



with it, is subdivided into right and left parts by a fissure of considerable- 

 depth known as the umbilical fissure from the circumstance that the umbilical 

 vein lies in it during embryonic life. The right part of the central lobe carries 

 the gall-bladder lodged in a deep depression, the fossa vesicae felleoe. 



The two lateral lobes are unequal in size, the left lateral lobe being generally 

 the larger. In addition it is distinguished by being the simpler, for to the 



Ductus cyslicus 



Venn portae 



Vena cava caudal is 



Flo. '26. — Outline of the visceral surface of the liver. 



right lateral lobe are appended two processes : caudate and papillary or omental. 

 The caudate process is the larger, and assists the right lateral lobe in forming 

 a fossa for the reception of the right kidney. In the dorso-medial part of the 

 process is a deep groove or canal in which the vena cava lies ; and in the 

 ventro-medial border of the process is a notch for the portal vein. The omental 

 process lies to the left of the caudate process, and is in intimate relation to 

 the lesser omentum, hence its name. 



Vesica fellea, etc. — A more complete view of the gall-bladder and its 

 associated ducts may now be obtained. 



