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Title: at what stage RBC lacks a nucleus? Post by: Jonesy- on Mar 24, 2013 at what stage RBC lacks a nucleus?
Title: at what stage RBC lacks a nucleus? Post by: Leifish on Mar 24, 2013 Production of New RBC's - Erythropoiesis (takes 4 days)
1. Hemocytoblasts - Stem cells in the bone marrow from which all blood cells form. 2. Proerythroblasts - are produced by the division and differentiation of stem cells. 3. Basophilic (early) erythroblasts - During this stage in erythropoiesis hemoglobin synthesis begins. 4. Intermediate erythroblasts - At this time, we see the accumulation of hemoglobin due to its continued synthesis. 5. Late erythroblasts - During this stage the nucleus is extruded from the cell.*********** <----HERE! 6. Reticulocyte - These cells exhibit a net-like appearance or reticulum in their cytoplasm when stained. A small number of reticulocytes (only 1 to 3% of the circulating red cells) are found in the circulation. 7. Mature erythrocytes - At this final stage of maturation there is a loss of ribosomes. These cells enter the circulation. |