Florence Sabin (1871–1953), a physician and research scientist, made important discoveries about the microanatomy of the brain and the development of the lymphatic system. Her research on tuberculosis significantly advanced knowledge of that disease’s pathology and immunology. Sabin was notable for a number of firsts. In 1925 she became the first woman elected to the National Academy of Sciences. She was also the first woman to become a full professor at Johns Hopkins Medical School and the first woman president of the American Association of Anatomists.