- 
  
  
 - 
  
  Greek civilizations used incantations and chanting to heal their sickly.
 - 
  
  A Greek physician Hippocrates used vinegar and wine to dress wounds, to act to as an antiseptic.
 - 
  
  
 - 
  
  Al-Razi was the first doctor ever who described symptoms and signs of smallpox and measles based on examination.
 - 
  
  Barber Surgeons were town barbers, and town surgeons. They often practiced blood letting, dental extractions, and amputations.
 - 
  
  Galen was a physician in the middle ages. He conducted dissections and vivisections on animals- usually apes- and how the learned a lot on how human body works. This helped in the Renaissance age, because his work was published.
 - 
  
  Renaissance hospitals housed not only the sick, but the poor, blind,insane,orphans, and travelers.
 - 
  
  Doctors usually cauterized wounds by pouring boiling water into them a doctor found that a combination of egg yolk, rose oil, and turpentine worked better.
 - 
  
  
 - 
  
  During this period cures for the black plague included placing a live hen next to swelling to draw out the pestilence. Also to quicken recovery, the patient was reccomenedto drink glass of their own urine twice a day, to eat theorgans of frogs, shaving a chicken and placing its bottom on the spots caused by the plague,and finally whipping themselves.
 - 
  
  Made the important discovery that the heart had two valves, by watching dogs die.
 - 
  
  
 - 
  
  The first doctor to discover a vaccination for smallpox.
 - 
  
  The stethoscope was invented by Rene Laennac
 - 
  
  A doctor discovered that microorganisms cause fermentation and diseases.
 - 
  
  X-Rays were discovered by an experiment that put an electrical current through gas at a very low pressure.
 - 
  
  A scientist synthesized heroin and aspirin, to be used as a medicine,
 - 
  
  
 - 
  
  Willhem was the inventor of the elctrocardiogram.
 - 
  
  The heart lung machine was created, that was able to temporarily take function of the heart and lungs.
 - 
  
  The first heart pacemaker was created that controlled abnormal heartbeats.
 - 
  
  The first full body MRI machine was created.
 - 
  
  Doctors discovered genomes and for the first time we could read a complete set of human genetic information and begin to discover what our roughly 23,000 genes do.
 - 
  
  Barber Surgeons were not only the town's barbers, but also their surgeons. The barbers often used bloodletting, dental extractions, and amputations.
 - 
  
  Surgeries became more used in this era, and surgeries were done for tumors, hernias, and cesarean sections- though not all of them were often succesful.
 - 
  
  The first bypass heart surgery was performed by a doctor.
 - 
  
  Egyptian doctors often used drugs from minerals and herbs that were drunk with wine or beer, or mixed with dough to created a "pill". Egyptian doctors also used ointments for wounds, and the process of inhaling steam to alleviate pain in the chest.