title: Ultrastructural studies on the life cycle of a short-lived metazoan, Campanularia flexuosa. II. Structure of the old adult.
mesh_terms: D000375:Aging; D000818:Animals; D003063:Cnidaria / Q000166:cytology*; D003593:Cytoplasm; D004721:Endoplasmic Reticulum; D006056:Golgi Apparatus; D008247:Lysosomes; D008854:Microscopy, Electron; D008928:Mitochondria; D009210:Myofibrils; D012270:Ribosomes