Collagen in the heart.
D000375:Aging; D000818:Animals; D000831:Animals, Newborn; D002478:Cells, Cultured; D003094:Collagen / Q000378:metabolism*; D005347:Fibroblasts / Q000378:metabolism; D006321:Heart / Q000254:growth & development*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D009206:Myocardium / Q000378:metabolism* / Q000648:ultrastructure; D051381:Rats
D003094:Collagen