title: The ultrastructure of the testis and follicular cells in the oocytes of Ascidia malacai.
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D008675:Metamorphosis, Biological; D008854:Microscopy, Electron; D010063:Ovum / Q000166:cytology*; D013737:Testis / Q000166:cytology*; D014561:Urochordata; D014817:Vitelline Membrane / Q000166:cytology