Our digestive tract starts in our mouth,then goes down the oesophagus,into the stomach,then the small intestines, large intestines and finally, out through the rectum and anus.
From beginning to end it is around 30 feet long - that`s around 9 metres.
It is essentially one long tube that brings the outside world into our body.
Its purpose is:
Once the food has passed through the stomach and into the small intestine, it begins to be absorbed. The lining of the small intestine is covered in villi,small finger-like projections off of its surface. There are between 6,000 to 25,000 villi per square inch of tissue.
It is through this amazing carpet of villi that our nutrients pass and head into our bloodstream. From here,they will head to the liver and sent on to where they are needed, or, sent to the colon or kidneys for excretion.