. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. dicated by the circum-stances of their occurrence. None of them are foundupon the stomach, nor even on that part of the duode-num above the entrance of the hepatic and pancreaticducts, but below that point they are scattered in pro-fusion all over the small intestine. The digestion offatty bodies not taking place until the food has gainedthe duodenum, vessels for the absorption of the emul-sions to which that digestion gives rise are not requireduntil after t
. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. dicated by the circum-stances of their occurrence. None of them are foundupon the stomach, nor even on that part of the duode-num above the entrance of the hepatic and pancreaticducts, but below that point they are scattered in pro-fusion all over the small intestine. The digestion offatty bodies not taking place until the food has gainedthe duodenum, vessels for the absorption of the emul-sions to which that digestion gives rise are not requireduntil after that point is passed. Correctly speaking,however, the lacteals are only lymphatics taking up oilpresented to them. In view of the use the oils subservein the animal economy, the lacteals are in reality an ap-pendix to the respiratory system. There can be nodoubt that through their channel oils and fats, under How many forms of absorption are there ? What do the lactealsand the veins respectively absorb? How may it be shown that thelacteals are connected with respiratory digestion ? Under what formdo they transmit fat to the blood ?. 70 INTRODUCTION OF FAT. the form of emulsions, are transmitted to the analysis of the chyle shows that it is always rich infat; and, indeed, it is supposed by some physiologiststhat the objects just described as cells, surrounding theorigin of the lacteals, are nothing more than oil or fatglobules accumulated there and waiting to be taken up,or that the disappearance and exuviation of the so-calledcells is an optical deception, due to their walls becomingpermeated with oil. The manner in which oil globules collect round theFig. 22. villus I have remarked as being very strikingly dis-played in the case of thegray squirrel after feedingon fatty nuts. As shownin Fig. 22, the whole struc-ture looks as if it were dis-tended with oil globules,ri a «, in the midst of which\ the origin of the lacteal,b b 5, may be discerned. Half-diagram of villi
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