[Age-related changes in the diameter of collagen fibrils of the rat gingiva].
D000367:Age Factors; D000375:Aging; D000818:Animals; D003094:Collagen; D003238:Connective Tissue / Q000648:ultrastructure; D005881:Gingiva / Q000648:ultrastructure*; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains
D003094:Collagen