402 



DIGESTIVE SYSTEM OF THE OX 



increase in size and displace tlie abomasum from contact with the liver. (4) Shallow grooves for 

 the S-shaped portion of the duodenum (Impressio duodenalis) may be found above and external 

 to the portal fissure. (5) The fossa of the gall-bladder (Fossa vesicae fellese) is distinct when 

 that organ is full. In the calf the omasal impression is small, and the abomasal one large in 

 correspondence with the relative sizes of these two sacs. 



The portal fissure is a well-defined rounded depression, situated dorsal to the 

 omasal impression. It contains, besides the vessels and duct, several large hepatic 

 lymph glands. Al)ove and external to it a part of the pancreas is attached. 



The dorsal border is short and thick; it extends backward a short distance 



Posterior 

 vena cava 



-Round 

 ligament 



Umbilical 

 fi55 ure 



Fig. 298. 



-Line Drawing of Liver op Ox, Visceral Surface of Soft Specimen. 

 L.g., Hepatic lymph-gLands at portal fissure. 



beyond the upper part of the last rib. It presents the large, thick, quadrilateral 

 caudate lobe, and a deep depression for the right kidney and adrenal. 



The ventral border is short and thin and has no interlobar incisures. 



The right (or external) border is marked by a small umbilical fissure, in which 

 the ligamentvun teres is attached in the young subject. 



The left border presents the oesophageal notch below its middle. Above this 

 it is practically median in position, and lodges the posterior vena cava, which is 

 partially embedded in the gland. Below the notch the border extends an inch or 

 two (ca. 2.5 to 5 cm.) to the left of the median plane opposite the ventral third of 

 the sixth rib. 



There is no left lateral ligament. The falciform ligament is usually present. 



