Red Blood Cell (RBC)
RBC count - Number of circulating RBCs per cubic millimeter of blood
Men 4.2–5.4 million/mm3
Women 3.6–5.0 million/mm3
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Reticulocyte count
Number of immature RBCs in 1 mm3 of blood
1–1.5% of total
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Hemoglobin (Hgb)
Hemoglobin (Hgb)
Amount of hemoglobin in 100 mL (1 dL) of blood
Men 14–16.5 g/dL
Women 12–15 g/dL
Men 14–16.5 g/dL
Women 12–15 g/dL
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Hematocrit (Hct)
Hematocrit (Hct)
Packed volume of RBCs in 100 mL of blood; reported as a percentage
Men 40–50%
Men 40–50%
Women 37–47%
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Mean corpuscular volume (MCV)
Mean corpuscular volume (MCV)
Average volume of individual RBCs
85–100 cubic micrometers (µm3) per cell
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Mean corpuscular hemoglobin (MCH)
Mean corpuscular hemoglobin (MCH)
Weight of the hemoglobin in an average RBC
31–35 g/dL
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Mean corpuscular hemoglobin concentration (MCHC)
Mean corpuscular hemoglobin concentration (MCHC)
Average concentration (percent) of hemoglobin within RBC
33.4–35.5%
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White Blood Cells (WBCs) and Platelets
WBC count
Number of WBCs per cubic millimeter of blood
5,000–10,000/mm3
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Differential WBC count
Differential WBC count
Neutrophils
Number of neutrophils released by bone marrow
Active phagocytes first to respond to inflammation or infection
60–70% or 3,000–7,000/mm3
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Eosinophils
Eosinophils
Respond to allergic reaction and parasitic infestations
1–3% or 50–400/mm3
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Basophils
Respond to allergic and inflammatory reactions
0.3–0.5% or 25–200/mm3
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Lymphocytes
Involved in immune reactions
20–30% or 1,000–4,000/mm3
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Monocytes
Monocytes
Active in disposing of foreign
3–8% or 100–600/mm3
