<prompt> Ratio of fat cells and blood cells in bone marrow is-1:041:021:012:01  <response>: Ratio of fat cells and blood cells in bone marrow is 1:1 Normal Myeloid: Erythroid ratio 3-4:1. Normal ratio of marrow cells: fat cells1:1. Normal Cellularity 100 - Age. Decreases with age At 10yrs 100-1090 cellularity At 30yrs100-3070 cellularity 