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John Hunter (1728-1793) was a Scottish surgeon regarded as one of the most distinguished scientists and surgeons of his day. He was an early advocate of careful observation and scientific method in medicine. Hunter was an excellent anatomist; his knowledge and skill as a surgeon was based on sound anatomical background. Among his numerous contributions to medical science are: 1) study of human teeth, 2) extensive study of inflammation, 3) fine work on gunshot wounds, 4) some work on venereal diseases, including possibly inoculating himself with venereal disease in 1767 to carry out further study, 5) an understanding of the nature of digestion and verifying that fats are absorbed into the lacteals, a type of small intestine lymphatic capillary, and not into the intestinal blood capillaries as was generally accepted, 6) the first complete study of the development of a child proof that the maternal and fetal blood supplies are separate, 7) unravelling of one of the major anatomical mysteries of the time-the role of the lymphatic system.