1)erythrocyte, red blood cell normal number. 4255)1012 in male ( 3, 5-5.0)X101/L in female -structure e biconcave discs in shape, 7.5-8.5 um in diameter/1-2um thick o no nucleus and organella e filled with hemoglobin Hb: about 1/3 normal number 120-150g/L in male 105-135q/L in female combine and transfer O, and co21) erythrocyte, red blood cell ---normal number: (4.2-5.5)X1012/L in male (3.5-5.0)X1012/L in female ---structure: biconcave discs in shape, 7.5-8.5 um in diameter, 1-2um thick no nucleus and organella filled with hemoglobin, Hb: about 1/3 -normal number: 120-150g/L in male 105-135g/L in female -combine and transfer O2 and CO2