DIGESTION OF FOOD. 



34Y 



Fig, 283.— Lymphatic syBtem of horse (Chauveau). A, facial and nasal plexus whose 

 branches pass to subglossal glands; B, C, parotid J^mphatic gland, sending ves- 

 sels to pnaryiigeal gland; D, E, large trunks passing toward thorax: P, G, H, 

 glands receiving superficial lymphatics of neck, a portion of those of limbs, and 

 those of pectoral parietes:-X, junction of jugulars; J, axillary Veins; K, summit 

 of anterior vena cava; L, thoracic duct; M, lymphatics of spleen; W, of stomach; 

 O, of large colon; S, of small colon; R, lacteals of small intestine, all going to 

 form two trunks, P, Q, which open directly into receptaculum chyli; T, trunk 

 which receives branches of sublumbar glands, U, to which vessels of internal iliac 

 glands, V, the receptacles of lymphatics of abdominal parietes, pass; W, precrural 

 glands receiving lymphatics of posterior limb, and which arrive independently in 

 the abdomen; X, superficial inguinal glands into which lymphatics of the mam- 

 mae, external generative organs, some superficial trunks of posterior limb, etc., 

 fiass; Z, deep inguinal glands receiving the superficial lymphatics, Z, of posterior 

 imbs. 



the work of the amceboid cells is confined to the transport of fat 

 alone, but that other matters are also thus removed inward to 

 the lacteal. 



When a multitude of facts are taken into account, there 



Fig. 284.— Perpendicular section through one of Peyer's patches in the lower part of 

 the ileum of the sheep (Chacveau). a, a, lacteal vessels in villi; 6, &, superficial 

 layer of lacteal vessels; c, c, deep layer of lacteals; rf, d, efferent vessels provided 

 with valves; /, Peyer'a glands; g, circular muscular layer of wall of intestine; A, 

 longitudinal layer. 



seems little reason to doubt that so important a process as ab- 

 sorption can not fail to be regulated by the nervous centers. 



