Dear Student
The human digestive tract is also known as the Gastrointestinal tract or alimentary canal.
It is a series of connected organs starting from the mouth to the anus. The digestive system allows us to break down the food we eat to obtain energy and nourishment.
The word "aliment-" means “to nourish”.
If you talk about digestive system it includes alimentary canal along with the digestive glands.
Regards