1. Every day, about 1.5 litres of saliva is secreted from our salivary glands, it is enough to fill two swimming pools if collect all your saliva lifetime.
2. An adult stomach can hold about 1.5 liters of food.
3. Your stomach will produce a new layer of mucous lining every two weeks, or your stomach will digest itself.
4. We eat about 500kg of food per year.
5. Food stays in your stomach for 2 to 3 hours.
6. Stomach is shaped like the letter J.