11. :Probably a seriously upset upper GI tract , followed by some vomiting. 12. However, swallowing can cause the particles to deposit into th GI tract . 13. The largest part of the GI tract is the colon or large intestine. 14. By this contact, ICC can regulate the neuromuscular responses observed throughout the GI tract . 15. The largest structure of the digestive system is the gastrointestinal tract ( GI tract ). 16. The whole human GI tract is about nine metres ( 30 feet ) long at autopsy. 17. This type of reflex includes reactions to food or danger triggering effects in the GI tract . 18. The frequency of the BER, and thus the contractions, changes throughout the GI tract . 19. Their GI tracts were checked before and after taking the drugs for changes in their stomach linings. 20. The myenteric plexus is the major nerve supply to the gastrointestinal tract and controls GI tract motility.