Digestive System. Digestion — the process where food is broken into simple forms the cells can use. 2 Main Functions of Digestion. Break down food Absorb food. Alexis St. Martin and Dr. William Beaumont — cool story.
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DESCRIPTION OF WOUND: The hole in St. Martin's side was a permanent open gastric fistula, large enough that Beaumont could insert his entire forefinger into the stomach cavity.