. Human physiology. ss, and finallyempty themselves into the receptaculum prove, that the chyliferous vessels do passthrough the liver, he put a ligature aroundthe duct below the diaphragm, in a dog whichhad eaten largely, and when digestion was infull activity. The chyliferous vessels wereobserved to swell, and their whitish colour wasdistinctly perceived. They could be traced,without much difficulty, from the interior of the intestinal canal, throughthe mesenteric glands, as far as their entrance into the liver. The chyliferous vessels are composed of two coats; the outer of afibrou
. Human physiology. ss, and finallyempty themselves into the receptaculum prove, that the chyliferous vessels do passthrough the liver, he put a ligature aroundthe duct below the diaphragm, in a dog whichhad eaten largely, and when digestion was infull activity. The chyliferous vessels wereobserved to swell, and their whitish colour wasdistinctly perceived. They could be traced,without much difficulty, from the interior of the intestinal canal, throughthe mesenteric glands, as far as their entrance into the liver. The chyliferous vessels are composed of two coats; the outer of afibrous and firm character, into whose composition muscular fibre-cellshave been found, by Ktilliker, to enter largely; the inner very thin, epi-thelial, and generally considered to form, by its duplicatures, are of a semilunar form, arranged in pairs, and with the convexside towards the intestine. Their arrangement has appeared to be welladapted for permitting the chyle to flow from the intestine to the tho-. Extremity of an Intestinal Vil-lus during absorption. a. Marginal layer of opithelinm-cells, b. Epitholium-colls turgidwith oleaginous matter, c. Adher-ent oil-globules. Nouvel Apei\u sur la Physiologie du Foie, &c., Paris, 1833. 212 ABSOEPTION. racic duct, and for preventing its retrograde course; but M. Magendie*affirms, that their existence is by no means constant. These reputedvalves are considered by M. Mojon^ to be true sphincters. By phicingthe lymphatic vessels on a glass plate, and opening them through theirentire length, he observed by the microscope, that they are formed ofcircular fibres, which, by diminishing the size of the vessel at differentpoints, give rise to the nodosities observed externally. If the ends ofa varicose lymphatic be drawn in a contrary direction, these nodositiesdisappear, as well as the supposititious valves. Mojon observed, more-over, that the fibrous membrane of the lymphatics has longitudinal, aswell as oblique, filaments passi
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