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Red blood cells are found in arteries, veins, ventricles, and the heart. If red blood cells are found outside of these areas, there is usually a problem.
We have seen blood consist of cells known as formed elements of blood. These cells have their own functions and roles to play in the body. Red blood cells (RBCs): RBCs are the biconcave cells; also known as erythrocytes. RBCs contain the iron-rich protein called haemoglobin; give blood its red color. RBCs are most copious blood cell produced in bone marrows.