Sure! Let's take a reverse journey through the human digestive system, starting from the outside and moving inward. This process will help illustrate how food is processed and broken down by the body.
### Start: The Mouth (Oral Cavity)
1. **Outside the Body**: The journey begins in the external environment, where food is ingested through the mouth.
2. **Mouth**: The food enters the oral cavity, where it is mechanically broken down by the teeth


