THE LIVER

The liver resembles that of the dog in position and loba- tion. It is divided by deep fissures into left lateral and medial lobes and right medial and lateral major lobes, supplemented by a smaller quadrate lobe and caudate process (Figure 34-8).

The gallbladder is situated between the quadrate and right medial lobes. Apart from its ventral margin, the liver lies under the protection of the ribs (Figure 33­4/3); the somewhat larger part is situated to the right of the median plane (Figure 34-8; see also Figure 3-53, B). The cranial surface is shaped to the diaphragm, and

Figure 34-6 The large intestine, schematic view from the right side. 1, Aorta; 2, caudal mesenteric artery; 3, cranial mesenteric artery; 4, celiac artery; 5, ileum; 6, cecum; 7, ascending colon; 8, transverse colon; 9, descending colon; 10, rectum.

Figure 34-7 The development of the ascending colon, left lateral view. 1, Descending duodenum; 2, caudal flexure of duodenum; 3, jejunum; 4, ileum; 5, cecum; 6, ascending colon; 7, transverse colon; 8, descending colon; 9, descending meso­colon; 10, mesoduodenum; 11, mesentery.

the caudal surface is indented by the stomach and duo­denum; other contacts with the pancreas, jejunum, and colon leave less distinct or no impressions.

The two most notable features of the liver of this species are the lack of contact with (and molding by)

Figure 34-8 Visceral surface of the liver. 1, Left lateral lobe; 2, left medial lobe; 3, right lateral lobe; 4, right medial lobe; 5, quadrate lobe; 6, caudate process; 7, porta; 8, gallbladder; 9, approximate position of median plane; 10, caudal vena cava.

the right kidney and the very well-developed fibrous tissue framework that prominently outlines the hepatic lobules on the surface and in section (Figure 3-52, A-B). The latter feature is relevant to the clinician because surgery is required if a biopsy is indicated (aspi­ration is impossible with so fibrous a tissue) and is also relevant to the producer because it limits the price the consumer can be charged for a not very palatable foodstuff.