402 



DIGESTIVE SYSTEM OF THE OX 



inrrease in size and displace the 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. (H) The fossa of the gall-bladder (Fossa vesica? fellea;) 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 

 lym]:)h jilands. Above 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 



\ar ligament 



^Umbilical 

 \\ Mill fissure 



Fig. 298. — Line Du.\wing op Livkr op O.x, VisrERAi. .ST'nF.\CE op Soft Specimen'. 

 L.(j., TIcpatip lymph-glaiiils at jxjrlal lissure. 



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

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



The ventral border is short and thin and has no interlol)ar incisures. 



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

 the ligamentinn teres is attached in the young subject. 



The left border presents the oesophageal notch l^elow its middle. Above this 

 it is practically median in position, and lodges th(^ 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. Tiie falciform ligament is usually present, 



