The gastro-intestinal system is the system of organs responsible for getting food into and out of the body and for making use of food to keep the body healthy.
It includes the salivary glands, mouth, aesophagus, stomach, liver, gallbladder, pancreas, small intestine, colon, and rectum.
Some people with autism are reported to suffer from gastro-intestinal problems. For example, they may have stomach aches more often than most people. Or they may suffer from constipation or diarrhoea.
There are various theories about the link between GI problems in people on the autism spectrum, some of them highly controversial and disputed.
For example, some people think that GI problems may cause or worsen some of the symptoms of autism,although this is not widely accepted by the scientific community.