The human gastrointestinal tract is the stomach and intestine, sometimes including all the structures from the mouth to the anus. (The “digestive system” is a broader term that includes other structures, including the accessory organs of digestion.
For detailed information check the link below.(Wikipidea)
The you tube video will provide a visual tool to enhance your understanding of this system.
A final option is the power point presentation that outline the function & structure of the digestive system.