Thread:RustyPipez/@comment-26182374-20170719135237

A meter is the distance light travels in 299,792,458 seconds

A mL of human saliva is 99.5% water but can contain as many as 8 million human cells and 500 million bacterial cells

Digestion begins in the mouth

Spit contains salivary amylase, an enzyme that breaks down carbohydrates. it also contains mucus that lubricates food and hydrogen carbonate so that the pH is right for amylase to function.

Chewing and starch digestion turn food into a soft mass called a bolus that's ready for swallowing so that digestion can continue 