Many microbial pathogens enter the gut of humans along with food. What are the preventive barriers to protect the body from such pathogens? What type of immunity do you observe in this case?

Explanation

### Step-by-Step Solution:

1. **Introduction to Pathogens and the Gut**:
- Microbial pathogens can enter the human body through contaminated food. These pathogens can cause various diseases if not effectively neutralized by the body’s defenses.

2. **Preventive Barriers in the Gut**:
- **Mucous Coating**: The epithelial lining of the gut is covered with a mucous coating. This mucus serves as a physical barrier that traps pathogens, preventing them from entering the cells of the gut lining.
- **Saliva**: Saliva contains enzymes and antimicrobial substances that help to neutralize pathogens before they reach the stomach.
...