• You will eat about 50 tonnes of food and drink 50,000 litres of liquid during your lifetime.
• Your digestive system, from the mouth to the anus, is about 30 feet long. The small intestine is the major part of this, measuring about 20 feet long.
• The inner surface of your small intestine is the size of a tennis court, to efficiently absorb nutrients.
• It takes about 32 hours for food to pass through you, from being swallowed to excreted, travelling at about 1 foot per hour. Swallowed food moves into your throat at about 25 feet per second.
• The digestive acids in your stomach are strong enough to dissolve metal, but you renew you stomach lining every three or four days so it doesn’t dissolve your flesh from the inside.
• Your salivary glands will produce enough saliva to fill two swimming pools in your lifetime, pouring about 1 litre into your mouth every day.
• Adults break wind about 14 times a day, producing 48 gallons of gas per year.
• Methane is odourless, but the smell is caused by trace amounts of sulphur released by bacteria in your large intestine.
BBC TV blog
Find out what Origins Of Us presenter Dr Alice Roberts discovered when she studied wild chimpanzees in the Ugandan forest: “they were all around us in the forest, and would often pass by very close, sometimes a metre or two away - which was both terrifying and exciting”Read Alice Roberts' full post on the BBC TV blog
- Alice Roberts
- Series Producer
- Zoe Heron
- Executive Producer
- Sacha Baveystock
- Matthew Dyas
- Matthew Dyas
Available on: DVD or Video download
From suppliers including: Amazon, BBC Shop, iTunes