702 BLOOD-VASCULAR SYSTEM OF THE HORSE 
The visceral glands include the following: 
1. The gastric lymph glands (Lgg. gastric) are situated along the course of 
the gastric arteries. Several occur on the saccus cxecus ventral to the left part of 
the pancreas, and along the attachment of the gastro-phrenic ligament. A group 
hes at the lesser curvature a short distance below the cardia. There is another 
small group on the visceral surface where the posterior gastric artery divides into 
its primary branches. There are usually two or three small nodes on the ventral 
aspect of the pylorus. Other small glands are scattered along the course of the 
gastro-epiploic and short gastric arteries, in the great and gastro-splenic omenta. 
The efferent vessels pass largely to the coeliac radicle of the cisterna chyli, but along 
the left part of the great curvature they go to the splenic glands. 
2. The hepaticlymph glands (Lee. hepatic) lie along the portal vein and 
hepatic artery and in the lesser omentum. Their efferent vessels go to the 
ceeliac radicle of the cisterna chyli. 
Many of the lymph vessels from the parietal surface of the liver pass in the falciform and 
lateral ligaments to the diaphragm and join the lymphatics of the latter. Some pass through the 
diaphragm with the vena cava and go to the mediastinal glands. 
The pancreatic lymph vessels follow the course of the blood-vessels which 
supply the gland; most of them go to the splenic and hepatic glands. 
3. The splenic lymph glands (Legg. lienales) lie along the course of the splenie 
blood-vessels in the hilus of the spleen and the gastro-splenic omentum. Their 
afferent vessels come from the subcapsular network of the spleen, from the greater 
curvature of the stomach, and from the left part of the pancreas. The efferents 
pass to the glands of the saccus czecus of the stomach and to the cceliac radicle of the 
cisterna chyli. 
4, The mesenteric lymph glands (Leg. mesenteric) are situated in the great 
mesentery near its root. They are numerous and hence lie close together. They 
receive a very large number of afferent vessels (400 to 500) from the small intestine. 
They have several considerable efferents, which concur in the formation of the in- 
testinal radicles of the cisterna chyli. 
The lymph vessels of the intestine form three sets of capillary plexuses, viz., in the subserosa, 
submucosa, and mucosa. The lymph follicles, solitary and aggregate, ie in the zone of the plexus 
of the mucosa. The collecting vessels arise from the subserous plexus. 
5. The cecal lymph glands (Legg. ceecales) are numerous and are distributed 
along the course of the cecal blood-vessels. Their efferents enter into the formation 
of an intestinal radicle of the cisterna chyli. 
6. The colic lymph giands (Leg. colicee) comprise those of the great colon and 
those of the small colon. The giands of the great colon are extremely numerous 
and are placed close together along the colic blood-vessels. Their efferent vessels 
are large and numerous. They converge to two large trunks which concur with 
those of the czeecum and small intestine to form an intestinal radicle of the cisterna 
chyli. The glands of the small colon are situated in part on the wall of the bowel 
along the attachment of the mesentery, in part between the layers of the latter 
along the course of the blood-vessels. The efferent vessels go to the lumbar glands 
and to the posterior intestinal radicle of the thoracic duct. 
The intestinal radicles of the cisterna chyli are formed by the confluence of efferents from 
the intestinal lymph glands. The anterior trunk lies on the left side of the anterior mesenteri¢ 
artery, passes between that vessel and the cceliac artery, turns sharply backward across the right 
renal vessels, and opens into the cisterna. It is formed by the union of the cceliac trunk with 
efferents from the glands of the small intestine, caecum, and colon. It is about four inches (ea. 
10 cm.) in length and is ampullate. The posterior trunk receives vessels from the small intestine 
and small colon. It usually opens into a trunk formed by the union of the right and left lumbar 
ducts. It is usually ampullate at its termination (Franck). The arrangement of these collecting 
trunks is, however, very variable. 
The rectal lymph glands (Legg. rectales) form a chain along the dorsal surface 
