In 1822 a French trapper named Alexis St. Martin was wounded in the abdomen by a musket blast. The resulting injury healed but left a fistula in the digestive tract that was open , a Doctor named Beaumont was intrigued by "almost being able to see the process of digestion" that he tied various foodstuffs such as roasted and raw meat to a piece of string and lowered it into the stomach and observed and noted the process of digestion.
Think of that.......
