title: An ultrastructural observation of Pelmatohydra robusta at sexual and asexual stages, with a special reference to "germinal plasm".
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002467:Cell Nucleus / Q000648:ultrastructure; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D005260:Female; D006056:Golgi Apparatus / Q000648:ultrastructure; D006829:Hydra / Q000502:physiology / Q000648:ultrastructure*; D008928:Mitochondria / Q000648:ultrastructure; D009865:Oocytes / Q000648:ultrastructure; D009867:Oogonia / Q000648:ultrastructure; D009940:Organoids / Q000648:ultrastructure