title: Cartilage induction in vitro. Ultrastructural studies.
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000166:cytology; D002356:Cartilage / Q000166:cytology*; D002454:Cell Differentiation; D003094:Collagen; D046508:Culture Techniques; D005347:Fibroblasts; D009132:Muscles / Q000196:embryology; D051381:Rats
chemical_list: D003094:Collagen