Final answer:
Hippocrates, the 'Father of Medicine,' contributed to medical principles followed by healthcare providers.
Step-by-step explanation:
The 'Father of Medicine,' Hippocrates, contributed to the medical principles that healthcare providers recite and follow. He believed that diseases had natural causes from within patients or their environments, rather than being caused by supernatural forces. His contributions can be found in the Hippocratic Corpus, a collection of some of the oldest surviving medical books, and he is often credited as the author of the Hippocratic Oath.