well first is goes into the mouth and chewed up while being mixed with saliva. Then... i don't know lets watch a video.
I wonder where our lunch is now and what is happening to it...
It travels through the esophagus to the stomach and gets and grinds the food to break it down into small particles. It then pushes the small particles of food into the first part of the small intestine. In a diagram below the parts in blue are the parts i have mentioned.
Then the food traveled through the large intestines where the liquids are absorbed. Lastly the waste food leaves the body through the rectum.