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A histological study of the parathyroids in the Anura
Author(s) -
Waggener Roy A.
Publication year - 1929
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050480102
Subject(s) - biology , parenchyma , cytolysis , stroma , cytoplasm , anatomy , stromal cell , regeneration (biology) , capsule , chromatolysis , pathology , microbiology and biotechnology , immunology , botany , immunohistochemistry , medicine , biochemistry , cytotoxic t cell , cancer research , in vitro , neuroscience , spinal cord
The parenchymal cells in the parathyroids of Rana catesbeiana (Shaw) are found to undergo a very curious cyclic change. The cytoplasm is broken down by a process of cytolysis. The nuclei are decomposed by chromatolysis and pycnosis. The entire parenchyma is finally liquefied, except for a layer of cells lining the capsule. The parathyroid body is reconstructed by young cells which are produced from rather definite growth centers. The process of regeneration begins some time before cytolysis is completed and continues until the entire organ is restored. The cytolytic and regenerative processes transpire in such sequence that the amount of apparently healthy tissue present at any one time is a rather large portion of the total mass normally present. The relationship between the parenchymal tissue and the stroma of the parathyroid is described.