| A | B |
| Romans | Began public health and sanitation systems |
| Hippocrates | The father of medicine |
| Egyptians | Earliest people know to maintain accurate health records |
| Chinese | Used acupuncture to relieve pain and congestion |
| Claudis Galen | Physician who believed the body is regulated by four fluids or humors |
| Leonardo da Vinci | Artist who used dissection to draw the human body |
| Dark Ages | Emphasis was placed on saving the soul, and the study of medicine was prohibited |
| Rhazes | An Arab physician who began the use of animal gut for suture material |
| Renaissance | Rebirth of the science of medicine |
| Andres Vesalius | Published first anatomy book |
| Edward Jenner | Developed a vaccine for small pox in 1796 |
| William Harvey | Described the circulation of blood to and from the heart |
| Gabriel Fahrenheit | Created the first mercury thermometer |
| Ambroise Pare | Called the father of modern surgery |
| Anton van Leeuwenhoek | Invented the microscope |
| Gregor Mendel | Established the patterns of heredity |
| William Roentgen | Discovered X-Rays in 1895 |
| Louis Pasteur | Began pasteurizing milk to kill bacteria |
| Florence Nightingale | Founder of modern nursing |
| Joseph Lister | Began using disinfectants and antiseptics during surgery |
| Marie Curie | Isolated radium in 1910 |
| Sir Alexander Fleming | Discovered penicillin in 1928 |
| Jonas Salk | Developed the polio vaccine in 1952 |
| Christian Barnard | Performed first successful heart transplant |
| Francis Crick and James Watson | Described how DNA carries genetic material |
| Robert Koch | Developed the culture plate method to identify pathogens. |