344 



COMPARATIVE PHYSIOLOGY. 



leucocytes, a few developing red corpuscles, an abundance of 

 fat in the form both of very minute oil-globules and particles 

 smaller still. 



Fig. 280.— Epithelium from duodenum of 

 rabbit, two hours after having been fed 

 with melted butter (Funkel. 



Fig. 281.— Villi filled with fat, from 

 small intestine of an executed crim- 

 inal, one hour after death (Fnnke). 



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, leucin) ; 



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, though 

 only roughly, be regarded 

 as blood without its red cor- 

 puscles, and chyle as lymph 

 with much neutral fat in a 

 very fine state of division. 



The Movements of the 

 Lymph — comparative. — In 

 some fishes, some birds, and 



Fig. 383.— Chyle taken from the lacteals and amphibians, there are lymph 

 thoracic duct of a criminal executed dur- ^ 



ing digestion (Punke). Shows leucocytes hearts. 



emuisfon.'''™'^ ''"' ^™""' "' '""'' I^ t^e frog there are two 



