Page 156 - The Veterinary Laboratory and Field Manual 3rd Edition

Parasitology 125

Figure 3.8 The general topography of the bovine
abdomen to show the location of the gut in situ.
(a) oesophagus; (b) reticulatum; (c) omasum; (d)
abomasum; (e) duodenum; (f) rumen. The intes- Figure 3.9 Simple plan of the ruminant intestinal
tinal tract is tightly coiled within the mesentery. tract (the omentum has been removed to show the
For a total egg count remove the entire intestinal general layout of key structures). (a) descending
tract which will be full of fluid and therefore quite colon; (b) duodenum; (c) abomasum; (d) mesenteric
heavy. Tie off the oesophagus in two places and cut lymph nodes; (e) small intestine; (f) colic spiral; (g)
between these two areas so that each cut end is caecum; (h) ascending colon. See Figure 3.10 for
sealed thereby avoiding leakage of fluids. Tie off the more detailed information.
rectum (see Figure 3.9) or end of the large intestine
in two places and make a cut to remove the entire
gastrointestinal tract. The general plan of the rumi-
nant intestinal tract is illustrated in Figure 3.9.

Figure 3.10 Detailed anatomical
outline of the intestines of a cow.
(a) descending duodenum; (b) caudal
flexure of the duodenum; (c) ascending
duodenum; (d) duodenal flexure;
(e) jejunum; (f) ileum; (g) caecum;
(h) proximal loop of the colon; (i)
centripetal gyri; (j) centrifugal gyri;
(k) distal loop of colon; (n) descending
colon.

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