68 ABSORPTION OF CHYLE. 



its passage separates into two parts; one called chyle, which is de- 

 posited upon the sides of the intestine to be absorbed ; the other, 

 composed of those parts of the food which are not nutritious, 

 which continues its route and enters into the large intestine. 



OF THE EXPULSION OF THE RESIDUE LEFT AFTER 

 DIGESTION. 



20. The alimentary matters which are not convertible into 

 chyle, require to be rejected and conveyed out of the body, and 

 for this purpose they enter into thfe large intestine, and there 

 accumulate. x 



21. The large intestine' is the second portion of the intestinal 

 tube; it differs from the small intestine in its calibre, its puffed 

 form and in its uses. It is divided into three portions ; the crvcum* 

 the co/o//, and the rectum, (page 67. fig- 23.) 



22. The caecum is a swelling, or dilatation wherein the small in- 

 testine terminates; we remark there a thin worm-like prolonga- 

 tion, which terminates in a cut de sac, or blind canal, and is called 

 the ccec.al appendix* appendiculn verniifonnia ; finally, we find 

 on its inside a sort of valve, which hinders the matters contained 

 in its cavity from returning into the small intestine. 



23. The colon is next to the ccecnut, and is continuous with the 

 -cctuin, which terminates at the anal opening or fundament. 



OF THE ABSORPTION OF CHYLE. 



24. The chyle is a peculiar liquid, resulting from the digestion 

 of food, and is deposited upon the parietes of the small intestines. 



25. The physical properties of this liquid, vary according to 

 the nature of the food from which it is derived, and according to 

 the animals in which it is observed. In man, and most mam- 

 malia, the chyle is generally a white, opaque liquid, very much 

 resembling milk, of an alkaline, saltish taste, and of a peculiar 

 odour. Examined by the microscope, it presents a multitude of 

 globules, analogous to those which form the central nucleus of 

 the globules of the blood. If left at rest, it forms a mass, like the 

 blood, and after sometime, separates into three parts; a solid clot 

 which occupies the bottom of the vessel, a liquid resembling serum, 

 and a thin pellicle, which swims on top, and seems to be of a 

 %tty nature. 



20. What becomes of those matters which are riot convertible into chyle ? 



21. What is the large intestine ? What are its divisions? 



22. What ie the coecum ? What is the crecal appendix ? 



23. What is the colon ? 



24. What is chyle? 



25. Is the appearance of chyle always the same? 



