The digestive system is the series of tubelike organs that convert our meals into body fuel. There are about 30 feet (9 meters) of these convoluted pipeworks, starting with the mouth and ending ...

The digestive system breaks down food into tiny particles ... specialised structures called villi which have a tiny hair-like structure poking into the small intestine to absorb digested food.

The digestive system breaks down food into tiny particles ... specialised structures called villi which have a tiny hair-like structure poking into the small intestine to absorb digested food.