The nuclear envelope in guinea pig spermiogenesis.
D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D006168:Guinea Pigs; D008297:Male; D008854:Microscopy, Electron; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000166:cytology