• Manfred Wick
  • Paul Lehmann
  • Wulf Pinggera
Conference paper


An adult has on average 5 liters of blood and an erythrocyte count of 5 × 106/μl, giving a total erythrocyte count of 2.5 × 1013. Since the mean life span of an erythrocyte is normally 120 days, about 2 × 1011 new erythrocytes need to be formed daily to maintain this erythrocyte pool. For this to happen, about 20–30% of the medullary stem cells must be differentiated to cells of erythropoiesis. Different stages in maturation can be identified on the basis of cell morphology and biochemical capacity. The immature nucleated cells, such as preerythrobalsts and erythroblasts (macroblasts), with their high DNA, RNA and protein synthesizing capacity, ensure that there is adequate proliferation of erythrocyte precursors under stimulation by erythropoietin.


Polycythemia Vera Neuraminic Acid Erythroid Progenitor Cell Hemoglobin Synthesis Mature Erythrocyte 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Wien 2003

Authors and Affiliations

  • Manfred Wick
    • 1
  • Paul Lehmann
    • 2
  • Wulf Pinggera
    • 3
  1. 1.Institute of Clinical Chemistry, Klinikum GrosshadernUniversity of MunichGermany
  2. 2.Roche Diagnostics GmbHMannheimGermany
  3. 3.Medical DepartmentGeneral HospitalAmstettenAustria

Personalised recommendations