This course will take you through normal erythrocytes and also show you abnormalities in color, size, shape and inclusions. 

Erythrocytes comprise the majority of cells in peripheral blood numbering roughly 3,8-5,2x10^12/L. The main function of the erythrocytes is to transport oxygen from the lungs to the rest of the body and carbon dioxide in the opposite direction. An erythrocyte normally lives for 120 days in the blood stream before it is removed by the reticuloendothelial system. A decrease in number of the erythrocytes is called anemia and increase is called polycythemia.