. Physiology, experimental and descriptive . ptones, fats are absorbed chiefly ina solid form —that is, in an emulsified condition. There canbe no question, in this case, of osmosis. It has been shownby nearly all recent work that the immediate agents in theabsorption of fats are again the epithelial cells of the villi ofthe small intestine. The fat-droplets are taken up by thesecells, and can be seen microscopically after digestion in theact of passing, or rather of being passed, through the cell-?substance. The epithelial cells, in other words, ingest thefat-particles lying against their fre
. Physiology, experimental and descriptive . ptones, fats are absorbed chiefly ina solid form —that is, in an emulsified condition. There canbe no question, in this case, of osmosis. It has been shownby nearly all recent work that the immediate agents in theabsorption of fats are again the epithelial cells of the villi ofthe small intestine. The fat-droplets are taken up by thesecells, and can be seen microscopically after digestion in theact of passing, or rather of being passed, through the cell-?substance. The epithelial cells, in other words, ingest thefat-particles lying against their free ends, and then passthem slowly through their cytoplasm into the substance ofthe villus. — Howell. 222 LYMPHATICS. The Lacteals and Lymphatics While the main work of the lymphatics, as we halve seen, is the carrying of lymphfrom the tissues of the body generally to empty into theveins of the neck, the lymphatics of the intestines haveanother important function. They absorb and carry the fatty portions of the digested Right Lymph Vein. Junction of ThoracicDuct with Left Sub-clavian Vein Main Lymph Vein(Thoracic Duct) Lymphatic Glands Fig. 66. Lymph Veins—Lymphatics. food into the general circulation. During most of the timethe thoracic duct and the lymphatics of the intestines wouldhardly be noticed, because they are filled* with the clear lymph. LYMPHATICS. 223 But after digestion of fatty matter they are filled with, thewhite Chyle, and are easily seen. To show the thoracic duct, feed a kitten or puppy on richmilk, and after two or three hours kill it as directed on page67. As soon as you are sure it is dead, open the abdominalcavity, and spread out the mesentery. The white lacteals,filled with chyle, will be seen radiating through the on some of these, and ij will be seen that they are thintubes filled with a white liquid. They converge toward theplace of attachment of the mesentery to the dorsal part of theabdomen. On the dorsal wall of the abdomen, ju
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