328 



ABDOMEN 



Intermediate form 

 \\ 



Solitary nodule 



lions of the mucous membrane, varying in length from about 

 .8 to .6 mm. (-^th to T V tn f an mc ty- They occur in enor- 

 mous numbers over the entire extent of the inner surface of 

 the intestine, not only upon the plicae circulares, but also in 

 the intervals between them, and they give to the mucous 



membrane a velvety or fleecy 

 appearance. 



To obtain a proper view of 

 the villi float out a portion of 

 the small intestine in water, 

 after it has been carefully 

 cleansed from adhering mucus, 

 and examine it with an ordin- 

 ary pocket-lens. If a portion 

 of the upper end of the jejunum 

 is placed side by side with a 

 portion of the lower part of the 

 ileum, and the two are con- 

 trasted, the student will readily 

 detect that the villi are, if any- 

 thing, larger and decidedly 

 more numerous in the jejunum 

 than in the ileum. They 

 diminish gradually in number 

 and in size from above down- 

 wards. 



Noduli lymphatic! aggre- 

 gati et noduli lymphatic! soli- 

 tarii. Aggregated lymph 

 nodules (O.T. PeyeSs patches] 

 and solitary lymph nodules 

 FIG. 152. Aggregated Lymph Nod- must also be looked for. Fre- 



ule and Solitary Lymph Nodules quen tly they are difficult tO 

 from the intestine of a child of two ? , * . r , , , , ,, 



years old. (Birmingham.) fin d, but if the bowel IS held 



up to the light they can gener- 

 ally be detected. When seeking aggregated lymph nodules 

 it is best to examine the ileum from below upwards. 



An aggregated lymph nodule consists of a large number of 

 lymph follicles grouped together so as to present to the eye 

 a patch of an elongated, oblong outline. The nodules are 

 placed upon that aspect of the intestine which is opposite to 

 the line of the mesenteric attachment, and the long axis of 



Aggregated 

 lymph nodule 

 (Payer's patch) 



Solitary lymph 

 nodule 



