title: An electron microscopic study on aging of collagenous fibrils in the large blood vessels of humans.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D001012:Aorta, Abdominal / Q000648:ultrastructure*; D001013:Aorta, Thoracic / Q000648:ultrastructure*; D002648:Child; D002675:Child, Preschool; D003094:Collagen / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014684:Venae Cavae / Q000648:ultrastructure*
chemical_list: D003094:Collagen