What does RBC 4.40 mean in a blood work?

RBC 4.40 refers to the red blood cell (RBC) count in a blood test, measured in millions of cells per microliter of blood. A value of 4.40 million cells/µL is typically within the normal range for adults, which generally falls between 4.2 to 5.9 million cells/µL, depending on factors like age and sex. This measurement is important for assessing overall health, as red blood cells are responsible for transporting oxygen throughout the body. If the count is abnormal, it may indicate conditions such as anemia or polycythemia.