title: Ultrastructural features of human spermiogenesis.
mesh_terms: D000328:Adult; D001706:Biopsy; D002467:Cell Nucleus; D003593:Cytoplasm; D006652:Histological Techniques; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D008928:Mitochondria; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000166:cytology*