The influence of hibernation upon the ultrastructure of the leydig cells and spermatids of the European hamster.
D000818:Animals; D006224:Cricetinae; D004721:Endoplasmic Reticulum; D005060:Europe; D006056:Golgi Apparatus; D006605:Hibernation; D007985:Leydig Cells / Q000166:cytology*; D008297:Male; D008854:Microscopy, Electron; D008928:Mitochondria; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*