ABDOMINAL CAVITY 



487 



Intermediate form 



Solitary nodule 



To obtain a proper view of these minute villous processes 

 it is necessary to float out a portion of the small intestine in 

 water, after it has been carefully cleansed from adhering mucus, 

 and examine it with an ordinary pocket-lens. If a portion 

 of the upper end of the jejunum be placed side by side with 

 a portion of the lower part of 

 the ileum, and inspected in this 

 manner, the student will readily 

 detect that the villi are, if any- 

 thing, larger, and that they are 

 decidedly more numerous, in 

 the jejunum than in the ileum. 

 They diminish gradually in 

 number and in size as we pass 

 down the small intestine. 



Aggregated lymph nodtiles 

 (O.T. Peyer's patches] and 

 solitary lymph nodules must also 

 be looked for. Frequently 

 they are difficult to find, but 

 by holding the bowel up to 

 the light they can generally 

 be detected. When seeking 

 aggregated nodules it is better 

 to begin at the lower end of 

 the ileum and pass upwards. 



An aggregated lymph nodule 

 consists of a large number of 

 lymph follicles grouped to- 

 gether so as to present to the 

 eye a patch of an elongated, 



oblong figure. The patches FlG - 187. Aggregated Lymph Nod- 

 are placed upon that aspect of 

 the intestine which is opposite 

 to the line of the mesenteric 



attachment, and the long axis of each corresponds in 

 direction with that of the intestine itself. 



In the lower part of the ileum the patches may present 

 a length of one, two, or even four inches, and a breadth of 

 about half an inch, but higher in the ileum they become 

 much smaller and not nearly so numerous, and they are few 

 in number or entirely absent in the jejunum. The total 



181* 



T v 



Aggregated 

 lymph nodule 

 (Peyer's patch) 



Solitary lymph 

 nodule 



ule and Solitary Lymph Nodules 

 from the intestine of a child of two 

 years old. (Birmingham.) 



its 



