from The Century Dictionary.
- noun A nucleated red blood-cell developed from an erythroblast, and having a globular, deeply staining nucleus in which a chromatin reticulum cannot be recognized. This nucleus is surrounded by a layer of cytoplasm containing hemoglobin. The normoblast becomes a typical red blood-corpuscle by extruding its nucleus. See cut under
lymphocyte, and under blood, 1.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
Sorry, no etymologies found.
Can survival of the fittest or random mutations explain how a hemocytoblast (first stage) could change (mature) into a proerythroblast, whose only apparent job is to change (mature) into an erythroblast, whose job is to become a normoblast and then a reticulocyte and finally a red blood cell?