Medical Laboratory Scientists analyze human blood, tissues, and body fluids. They also oversee the performance of thousands of types of medical laboratory tests using a wide variety of precision instruments and manual methods. Also known as Medical Technologists, this position exercises independent judgment, correlates test results, and interprets the findings with respect to normal or abnormal ranges. Physicians depend on Medical Laboratory Scientists to produce reliable and valid results, which may be used in determining the presence, extent, and possible cause of disease.