Reticulocyte ( Polychromatic Erythrocyte / Diffusely Basophilic Erythrocyte )
- Size = 7-10 μm
- No nucleus (so there is no N/C ratio)
- No nucleoli
- No chromatin
- Cytoplasm: Color is slightly more blue/purple than the mature erythrocyte because there are RNA remnants.
- Bone marrow: 1 %
- Peripheral blood: 0.5 - 2.0 %
NOTE: When stained with supravital stain (e.g., new methylene blue), polychromatic erythrocytes appear as reticulocytes (contain precipitated ribosomal material)
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