What does a Complete Blood Count (CBC) measure?

A Complete Blood Count (CBC) measures several critical components of the blood, including red blood cells (RBCs), white blood cells (WBCs), and platelets. Each of these components provides valuable information regarding a person's overall health and can help in diagnosing various medical conditions.

The red blood cells are essential for transporting oxygen from the lungs to the tissues and carrying carbon dioxide back to the lungs for exhalation. The white blood cells play a crucial role in the immune system, helping the body fight infections and other diseases. Platelets are necessary for blood clotting and help prevent excessive bleeding.

By assessing all three components in a single test, the CBC provides a comprehensive overview of an individual's hematologic status, which is vital for identifying conditions such as anemia, infection, and clotting disorders. This multifaceted approach distinguishes a CBC from tests that measure only one aspect of blood, such as hemoglobin levels, or focus solely on red or white blood cells.