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Making the world better, one answer at a time. 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.Veins and arteries are found all around the body. Ventricles are found in the heart.aking the world better, one answer at a time. 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.
Red blood cells carry nutrients and oxygen to the body's cells. Red blood cells are come from bone marrow. White blood cells help the body fight diseases and infections. The white cells are made in the bone marrow. Plasma is the watery part of the blood.