. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 377 These were typical in appearance, rounded, paler in colour than the thyroid and having a separate and distinct blood supply. The animal lived without any symptoms for eighty three days, when a second oper- ation was performed. The two parathyroids which had been left behind were found to have hypertrophied and each of them showed on microscopic examination the appearance depicted in Fig. 1. ß .J>'<i— 4i,'r - - e. interves. — e. ves. t^»5 3- Fig. 1. Parathyroid of dog, eighty-three days after thyroidectomy, showing v
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 377 These were typical in appearance, rounded, paler in colour than the thyroid and having a separate and distinct blood supply. The animal lived without any symptoms for eighty three days, when a second oper- ation was performed. The two parathyroids which had been left behind were found to have hypertrophied and each of them showed on microscopic examination the appearance depicted in Fig. 1. ß .J>'<i— 4i,'r - - e. interves. — e. ves. t^»5 3- Fig. 1. Parathyroid of dog, eighty-three days after thyroidectomy, showing ve- sicles, some of which contain colloid. X 120. c. colloid, intervesicular epi- thelial tissue, ves. vesicle, eves, colloid vesicle, epithelium lining to vesicles. They had to all intents and purposes become converted into thyroid. There was still a comparatively large amount of intervesi- cular tissue which was identical with that of the solid columns forming the normal parathyroid. See Fig, 2. — ^^000^: ^ •••••• Fig. 2. Normal parathyroid of dog. X ^-*^- ^•''•'^- ^^^^^^ columns of cells, blood vessel. To be compared with Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Anatomische Gesellschaft. Jena : G. Fischer
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