title: Structural aspects of ovulation in the lamprey, Petromyzon marinus.
mesh_terms: D000818:Animals; D005260:Female; D005399:Fishes / Q000502:physiology*; D007798:Lampreys / Q000033:anatomy & histology / Q000502:physiology*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D009865:Oocytes / Q000254:growth & development / Q000648:ultrastructure; D010053:Ovary / Q000502:physiology / Q000648:ultrastructure; D010060:Ovulation; D010063:Ovum / Q000254:growth & development