A complete blood count (CBC): is the most widely requested and single most important lab test on blood. Many CBCs are done as routine screens – tests that provide general information ...

Hemoglobin, the oxygen-carrying component of RBCs, is composed of two pairs of protein chains called globin and four smaller units called heme, which contain iron. Iron binds and releases ...

 

This is CBC diagram from patient with iron deficiency anemia, notice that: Hemoglobin, Hematocrit is decreased —> Anemia MCV is low —> Microcytic Anemia MCH is low ...