title: [Ultrastructure and significance of the "tubular bodies" and "particles" of the hydra mesoglia].
abstract: Previous investigations described two kinds of enigmatic ultrastructures in Hydra mesogloea, "tubular bodies" and "particles". Evidence is presented that "tubular bodies" are cytoplasmic spiral processes, 1 500 A thick, often containing polysaccharidic particles (900 A in diameter). Large extracellular "particles" (450-800 A) are also identified as polysaccharides. These particles are enclosed in a meshwork of closely arranged fibrils. The relationship of the "tubular bodies" to polysaccharidic extracellular particles is discussed.
mesh_terms: D000818:Animals; D004475:Ectoderm / Q000648:ultrastructure; D004707:Endoderm / Q000648:ultrastructure; D005110:Extracellular Space / Q000648:ultrastructure; D006829:Hydra / Q000378:metabolism / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure; D011134:Polysaccharides / Q000378:metabolism
chemical_list: D011134:Polysaccharides
vernacular_title: Ultrastructure et signification des "corps tubulaires" et "particules" de la mésoglée chez les Hydres