Age and the hematopoietic system.
D000367:Age Factors; D000368:Aged; D000375:Aging; D000740:Anemia / Q000453:epidemiology; D000818:Animals; D001853:Bone Marrow / Q000502:physiology; D002454:Cell Differentiation; D002478:Cells, Cultured; D005260:Female; D006410:Hematopoiesis; D006412:Hematopoietic Stem Cells / Q000502:physiology; D006413:Hematopoietic System / Q000502:physiology*; D006801:Humans; D008297:Male; D051379:Mice; D008875:Middle Aged; D011502:Protein-Energy Malnutrition / Q000097:blood; D013154:Spleen / Q000166:cytology