| A | B |
|---|
| Gabriel Fahrenheit | Created the first mercury thermometer in 1714 |
| Anton van Leeuwenhoek | Invented the microscope in 1666 |
| Rene Laennec | Invented the stethoscope in 1816 |
| Elizabeth Blackwell | Became the first female physician in the United States in 1849 |
| William Roentgen | Discovered X-rays in 1895 |
| Robert Koch | Developed the culture plate method to identify pathogens in 1882 |
| Marie Curie | Isolated radium in 1910 |
| Florence Nightingale | Established efficient and sanitary nursing units during the Crimean war |
| William Harvey | Described the circulation of the blood to and from the heart in 1628 |
| Louis Pasteur | Proved microorganisms cause disease and created a vaccine for rabies |
