While physical examinations and diagnostic images like x-rays can certainly help diagnose illnesses, the medical test has become integral to the practice of modern medicine. Laboratory science technologists and technicians are the professionals responsible for running these tests which help medical professionals understand our physical state. Laboratory technologists prepare tissue, blood, and other fluid samples for clinical tests, and they help decide which tests are appropriate for particular samples and patients. Laboratory technicians provide assistance and perform less complex tasks than technologists, such as drawing blood or doing manual tests via written instructions. Clinical laboratory technologists need a bachelor's degree in medical technology or a life science in order to begin their career; technicians need a certificate or associate's degree.