LYMPHATIC SYSTEM OF THE OX AND SHEEP 731 
(3) The left ruminal lymph glands (Lgg. ruminales sinistre) are inconstant. 
One or two may be present in the left groove of the rumen. Their afferent vessels 
come from the rumen, and the efferent vessels go to the anterior or the right ruminal 
glands. 
(4) The anterior ruminal glands (Lgg. ruminales craniales) are deeply situated 
in the anterior groove of therumen. They average four or five in number and about 
half an inch (ca. 1.5 em.) in length. They receive lymph vessels from the rumen 
and from the left ruminal glands, and their efferent vessels go to the right ruminal 
and atrial glands. 
(5) The reticular lymph glands (Lgg. reticulares) are situated on the reticulum 
above and below its junction with the omasum. They receive afferent vessels 
chiefly from the reticulum and the adjacent parts of the omasum and abomasum. 
Their efferent vessels go chiefly to the atrial lymph glands. 
(6) The omasal lymph glands (Legg. omasic) lie on the omasum chiefly along 
the course of the dorsal omasal vessels. Their afferent vessels come from the 
omasum, and the efferent vessels go chiefly to the atrial lymph glands. 
(7) The dorsal abomasal lymph glands (Lgg. abomasice dorsales) form a series 
along the lesser curvature of the abomasum. They receive afferent vessels from 
the abomasum, duodenum, and ventral part of the omasum. The efferent vessels 
go chiefly in the lesser omentum to the hepatic lymph glands, but some from the 
anterior part of the series go to the omasal and reticular glands. 
(8) The ventral abomasal lymph glands (Lgg. abomasice ventrales) comprise 
a few nodes in the fat along the greater curvature of the pyloric part of the abo- 
masum or in the omentum an inch or two distant from the abomasum.! They 
receive afferent vessels from the abomasum and the duodenum and their efferent 
vessels go to the hepatic lymph glands. 
The mesenteric lymph glands (Leg. mesentericee) comprise a large number of 
nodes which receive lymph from the intestine. The following groups may be 
recognized, although the distinction is in part conventional. 
(1) The duodenal lymph glands (Lgg. duodenales) are small nodes in the 
anterior part of the mesoduodenum. They receive afferent vessels from the duo- 
denum and their efferent vessels go to the hepatic lymph glands. 
(2) The jejuno-ileal lymph gland (Legg. jejuno-ileales) lie in the part of the 
mesentery to which the coils of the jejuno-ileum are attached. They vary in 
number from ten to fifty, and in length from about a quarter of an inch to four feet 
(ca. 0.5-120 em.). Asarule, the long narrow glands are in the peripheral part of the 
mesentery, while numerous small nodes are scattered throughout the mesentery 
and extend centrally to the coils of the colon. Their afferent vessels come from the 
mesenteric part of the small intestine. The efferent vessels converge to form a 
large common efferent vessel. This receives efferent vessels of the cecal and colic 
lymph glands, runs upward and forward on the right side of the spiral mass of the 
colon, and reaches the ventral face of the posterior vena cava just behind the an- 
terior mesenteric artery; here it unites with the common efferent vessel of the 
gastric lymph glands to form the intestinal trunk. 
(3) The czecal lymph glands (Leg. cecales), usually not more than two or three 
in number, are situated along the attached surface of the cecum. Their efferent 
vessels come from the cecum and ileum. The efferent vessels go to colic or ileal 
glands or to the common efferent vessel. 
(4) The colic lymph glands (Legg. colic) are situated in part superficially on 
the right side of the spiral mass of the colon, in part deeply between the coils. One 
or two are constantly present on the initial part of the colon, near the termination 
of the ileum. The afferent vessels come from the colon chiefly, but some of the 
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