Elements of animal physiology, chiefly human . f the lymphatic system. It is about 18 or20 inches long, and about the diameter of a moderatesized goose-quill. Commencing in the abdomen, some-where opposite the second lumbar vertebra, it passesthrough the diaphragm by the aortic opening, ascendingnear the vertebral column to the neck; it then curvesdownward, and joins the subclavian vein at the angleformed by its junction with the jugular vein. Itsstructure is very similar to that of the veins, and it isnumerously supplied with valves (see fig. 59). The rightlymphatic duct is small and unimport
Elements of animal physiology, chiefly human . f the lymphatic system. It is about 18 or20 inches long, and about the diameter of a moderatesized goose-quill. Commencing in the abdomen, some-where opposite the second lumbar vertebra, it passesthrough the diaphragm by the aortic opening, ascendingnear the vertebral column to the neck; it then curvesdownward, and joins the subclavian vein at the angleformed by its junction with the jugular vein. Itsstructure is very similar to that of the veins, and it isnumerously supplied with valves (see fig. 59). The rightlymphatic duct is small and unimportant; it containsno chyle. 273. The Lacteals are the hjm-phatio vessels of theH B, -J 130 ANIMAL PHYSIOLOGY. intestines. They are so called because of their millcxjappearance, when filled with chyle, two or three hoursafter a meal. The primary lacteals commence in the LymTiliatics ami LyiriiMiatic Glands ol head aud iieck, riglit. ;iht internal Jugulnr, Subclavian Vein, Lymphatics and rijjlit ana Eeecxitaculura Ljiaphaics ami Lymiiliatic Glai d; of head and, uec!: left. horacic Liuct. Left SubeaviuuYcui. •Tlioiacic . and Mes-enteric Glands. Lym]>batic3 and Wp^Byj|BHPiE!MS^HISyiytfSS?WPWBHL^yl^^^^°^luwetLymphatic kUukI? cf 4S0l»»#KwSKBSlMBS»HlWi9HMr e.\ extrj-nlticu Fig. 59. Showing the Principal Lymphatics of the Human small nodular bodies are the Lymphatic Glands. middle of the villi of the intestines, where they formmicroscopic club-like tubes, or minute microscopicplexuses. (See fig. 59.) THE CHYLE. 131 274. The Lymphatics are the vessels which ahsorh andelaborate the lymj^h, and convey it to the tJioraciG a long time the smaller lymjDhatics escaped detec-tion, because of the transioarency of their walls and ofthe contained lymi^li. There are two sets of lymphatics—the deep and the superficial. They are distributed toall parts of the body, except the brain, the spinal cord,and the int
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