78 Framework of Glandula Parathyroidea 



of the gl. Thyroidea ■where its finer structure and limiting envelope bring 

 it out in sliarp contrast to the follicles of the thyroid that embrace it on 

 three sides. The little organ is oval in both transverse and logitudinal 

 planes giving it plasticly the form of a prolate spheroid. As shown by 

 this method the structure of the thyroid has been previously described * 

 and when the plane of section includes both organs, a glance is suflBcient 

 to separate them owing to the marked differences in their structure. At 

 first sight in piece digestions, the parathyroid has a homogeneous, ground- 

 glass appearance without showing any very striking features excepting 

 the blood vessels that traverse its substance; but if the specimen is care- 

 fully studied with high oculars and rapid alterations in the quantity and 



FiQ. 1.— Piece Dig-estion of the Thyroid and Parathj'roid of a Monkey. Extracted with 

 ether, digested with trypsin and cleared in g-lycerine. X 19. The general form and arrange- 

 ment of the thyroid follicles are readily made out. Beneath the capsule and embraced by 

 its split laminaj is the parathyroid body. The large septa and vessels as well as the finer 

 septa can be seen on the surface, while the vessels are readily followed into the depths- 



a= Finer septa of parathyroid. b= Blood-vessel and coarser septa. c=Capsule of parathy- 

 roid at point of splitting. d=Capsule of thyroid. e=rollicles of thyroid. 



variety of light with which it is illuminated, delicate, fine septa on the 

 surface of the organ come into view\ Owing, however, to their extreme 

 delicacy they are indistinctly shown and the picture accordingly is not as 

 instructive as one form those organs where the connective tissue is accu- 

 mulated into larger and more definite processes and septa. 



Besides the more delicate septa that embrace the cell complexes of the 

 parathyroid w^e see the blood vessels which are always accompanied by 

 relatively thick connective tissue processes. As a rule these run in the 



=* Flint: The Johns Hopkins Hospital Bulletin, 1903. 



