title: Types of collagen fibres in the calcareous sponges Sycon and Leucandra.
mesh_terms: D000818:Animals; D003094:Collagen; D003648:Decalcification Technique; D008854:Microscopy, Electron; D010772:Phosphotungstic Acid; D011161:Porifera / Q000648:ultrastructure*; D013194:Staining and Labeling
chemical_list: D010772:Phosphotungstic Acid; D003094:Collagen