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The erythrocyte, commonly known as a red blood cell (or RBC), is by far the most common formed element: A single drop of blood contains millions of erythrocytes and just thousands of leukocytes. … Learn about erythrocytes , the anucleate, biconcave cells that transport oxygen and carbon dioxide in the blood. Find out their structure, function, life cycle, disorders and more with Kenhub. Red blood cells or RBCs are also called erythrocytes . RBCs serve as the functional components in blood which is responsible for the transportation of gases and nutrients across the entirety of the human body. Shape and Structure of Erythrocytes As an erythrocyte matures in the red bone marrow, it extrudes its nucleus and most of its other organelles. During the first day or two that it is in the circulation, an immature erythrocyte, known as a reticulocyte, will still typically contain remnants of organelles. Reticulocytes should comprise approximately 1–2 percent of the erythrocyte count and provide a rough estimate of the rate of RBC production, with abnormally low or high rates indicating ...
