10 Interesting Facts About Your Digestive System Your Digestive System Is Surprisingly Long. ... You Produce a Lot of Saliva. ... Swallowing Is a Pretty Complex Operation. ... Your Stomach Produces Hydrochloric Acid. ... Your Pancreas and Liver Are Not so Mysterious. ... So Much Happens in Your Small Intestine. ... Fiber Is Very Important. More items... Mar 25, 2020