title: Age changes in the quantity of hematopoietic tissue.
abstract: The ratio between hematopoietic tissue and lipoid tissue was determined by histologic planimetry in bone marrow biopsies from 52 persons without bone or blood disorders, aged from 20 to 85 years. The ratio decreased significantly with increasing age, Equally in the two sexes. The ratio correlated significantly to the hemoglobin concentration in the blood.
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology*; D000375:Aging; D001853:Bone Marrow / Q000033:anatomy & histology*; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male
chemical_list: D006454:Hemoglobins