DIGESTION OF FOOD. 343 
Microscopic examination shows the chyle to contain (when 
coagulated) fibrin, many leucocytes, a few developing red cor- 
puscles, an abundance of fat in the form both of very minute 
oil-globules and particles smaller still. 
Hin DOs 
Fic. 285.—Epithelium from duodenum of rab- — Fie. 286.—Villi filled with fat, from small 
bit, two hours after having been fed with intestine of an executed criminal, one 
melted butter (Funke). hour after death (Funke). 
There are also present fatty acids, soaps small in quantity 
as compared with the neutral fats, also a little cholesterin and 
lecithin. But chyle varies very 
widely even in the same animal 
at different times. To the above 
must be added proteids (fibrin, 
serum-albumin, and globulin); 
extractives (sugar, urea, leu- 
cin); and salts in which sodium 
chloride is abundant. 
The composition of lymph is 
so similar to that of chyle, and 
both to blood, that lymph 
might, with a fair degree of ac- 
curacy, be regarded as blood 
without its red corpuscles, and yy, 2a7—Chyle taken from the lacteals 
7 and thoracic duct of a criminal exe- 
chyle as lymph with much neu- cuted during digestion (Funke); SHOWS 
7 . leucocytes and excessively fine granules 
tral fat in a very fine state of — of'tatty emulsion. 
division. 
The Movements of the Lymph—comparative——In some fishes, 
some birds, and amphibians, there are lymph hearts. 
In the frog there are two axillary and two sacral lymph 
hearts. The latter are, especially, easily seen, and there is no 
doubt that they are under the control of the nervous system. 
