Old bones.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D005260:Female; D006801:Humans; D008297:Male; D008593:Menopause; D008663:Metacarpus / Q000000981:diagnostic imaging; D008875:Middle Aged; D010024:Osteoporosis / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000473:pathology; D011859:Radiography; D012737:Sex Factors