[An electron microscopic study on the aging process of the lumbar intervertebral disc].
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007403:Intervertebral Disc / Q000648:ultrastructure*; D008159:Lumbar Vertebrae / Q000648:ultrastructure; D008854:Microscopy, Electron; D008875:Middle Aged; D011247:Pregnancy