1. Red Blood Cells (RBCs) Hemoglobin (Hgb or Hb): Measures the oxygen-carrying protein in red blood cells. Hematocrit (Hct): Percentage of blood volume made up of red blood cells. RBC Count: Number of red blood cells per microliter of blood. 2. White Blood Cells (WBCs) WBC Count: Total number of white blood cells, which help fight infection. Differential: Measures different types of white blood cells (neutrophils, lymphocytes, monocytes, eosinophils, and basophils). 3. Platelets (PLT) Helps with blood clotting. Low platelets may indicate bleeding issues, while high platelets may suggest clotting problems. Why Get a Blood Count Test? Doctors use it to check for infections, anemia, immune system disorders, and overall health. Do you have specific questions about a blood count result?