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STUDENTS HISTOLOGY 



stained lymph-corpuscles. (6) The network of the iymphoid (or 

 adenoid) tissue. (This will be greatly obscured by the Iymphoid 

 cells.) (c) The blood-capillaries. Only recognized by the con- 

 tained corpuscles, (d) Minute trabeculae of the connective tissue 

 projected from the capsule. 



8. The medulla of the follicles, (n) The sparsity of lymph- 

 corpuscles as compared with the cortical portions, (6) Large 



FIG. 83. SECTION OP A PORTION OF THE THYMUS BODY FROM A CHILD SIXTEEN 

 DAYS AFTER BIRTH ()< t>0). 



A. A. Capsule which divides the organ into lobes. Portions of six lobes 



are visible in the section. 



B. B. Lymph-sp.aces. 



0. C. Trabeculze dividing the lobes into imperfect lobules. 



D. D. Subdivisions of the last into follicles. 



E. E. Central light portion of the lobules. 



mononucleated cells. (c) Still larger multinucleated cells. 

 (d) Larger though varying in size spherical bodies, Hassall's 

 corpuscles. (These are composed of epithelial cells, arranged 

 concentrically, and are unlike any other structure found in the 

 normal tissues of the body. They resemble the smaller "cell- 

 iiests " of epithelioma. The corpuscles of Hassall are the remains 

 of the epithelial structure, which makes up the bulk of the thy- 

 mus body in its early stages.) (e) Small thin- walled venules. 



