Ultrastructure of Spermatogonia and Primary Spermatocytes of C57BL6J Mice

Autor:	J. R. C. P. Silva, M. R. F. B. Martins
Rok vydání:	2001
Předmět:	Basement membrane endocrine system Cell type General Veterinary urogenital system Endoplasmic reticulum General Medicine Biology Chromatin Cell biology Synaptonemal complex medicine.anatomical_structure Cytoplasm Ultrastructure medicine Intracellular
Zdroj:	Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C. 30:129-132
ISSN:	1439-0264 0340-2096
DOI:	10.1046/j.1439-0264.2001.00313.x
Popis:	The three types of spermatogonia were confirmed. Type A spermatogonia have a large nucleus and loose chromatin and are poor in endoplasmic reticulum. The second type, B spermatogonia, have rounded and smaller nuclei filled with more electron-dense nucleoplasmic material. The endoplasmic reticulum has the aspect of round or elongated cisterns that are free in the cytoplasm or close to the basement membrane. In contrast, intermediate spermatogonia present chromatin material with intermediate condensation compared with the two previous cell types. Primary spermatocytes are characterized by the presence of intercellular bridges and a synaptonemal complex. In the late pachytene stages, the synaptonemal complex was found to be enveloped by chromatin material.
Databáze:	OpenAIRE
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