CHAPTER XIV. 

 BLOOD GLANDS. 



Lymph gland. T.S. (p. 8, s. 22 & 24, c. P., m. B.) (L) The 

 organ is divided into an external denser cortex and a more 

 open inner texture, the medulla. The latter, especially in 

 small glands, is placed close to one side near the hylum, the 

 place of entrance of the blood-vessels. A capsule covers the 

 surface from which prolongations the trabeculce run inwards 

 nearly straight in the cortex, to become network-like in the 

 medulla. In small glands this tissue is scanty. A narrow, 

 clear space, the lymph sinus, separates them everywhere from 

 the follicular portion, the substance proper of the organ. 

 In the cortex there are frequently rounded areas rendered 

 evident by the stain, and which bear a close resemblance to 

 the splenic bodies, (ff) The capsule is of fibrous tissue and 

 contains varying quantities of non-striped muscle. The sinus 

 is traversed by branching lymphoid tissue with scattered cells 

 in its meshes (lymph cells). The follicular tissue is sharply 

 marked off from the sinus, and is packed with lymph cells, 

 the nuclei of which show frequent evidence of mytosis. 



Injected lymph gland. (Blue gelatin mass, p. 2 (d), s. 24, c. P., 

 m. B.) The blood-vessels enter at the hylum and ramify in 

 he trabeculse to be distributed in capillary loops in the follicular 

 system. The gland is not very vascular. 



Tonsil, Dog. V.S. (p. 8, s. 22 & 24, c. P., m. B.) (L) Find the 

 indented oral surface covered with stratified squamous epithelium, 

 and beneath this the lymph nodules embedded in areolar tissue. 



