The Digestive System Biology 11 McIntyre. Fun Facts We eat about 500kg of food per year. 1.7 liters of saliva is produced each day You can swallow even.
HUMAN DIGESTION. Fun Facts We eat about 500kg of food per year. We eat about 500kg of food per year. 1.7 liters of saliva is produced each day 1.7 liters.
