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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.
The red blood cells are produced in the red bone marrow in the center of the bone. Marrow. Red blood cells, or erythrocytes, are made in the bone marrow as are white blood celâ¦ls or leukocytes and they originate from stem cells.