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what are the two general types of RBC disorders?
anemia and polycythemia
what is anemia?
deficit of mature, healthy RBCs in circulation
insufficient delivery of O2 to the tissues
how common is anemia?
higher incidence associated in poor socioeconomic conditions
commonly seen in children in underdeveloped countries
what is polycythemia?
overproliferation of RBCs in the bone marrow → making too many RBCs
how common is polycythemia?
less common worldwide