Name the factors which do not allow them to enter the body

Options

A. physiological barrier
B. anatomical barrier
C. inflammatory barrier
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Innate Immunity:**
- Innate immunity is the body's first line of defense against pathogens. It consists of various barriers that prevent harmful microorganisms from entering the body.

2. **Identifying Types of Barriers:**
- There are several types of barriers that play a role in innate immunity:
- **Physiological Barriers:** These include internal factors that create an unfavorable environment for pathogens.
- **Anatomical Barriers:** These are physical structures that prevent pathogens from entering the body.
- **Inflammatory Barriers:** These are responses that occur when tissues are damaged or infected, helping to prevent the spread of pathogens.

3. **Examples of Barriers:**
- **Physiological Barriers:**
- Acid in the stomach: The acidic environment kills many pathogens that enter through food.
- Saliva in the mouth: Contains enzymes that break down bacteria and other pathogens.
- **Anatomical Barriers:**
- Skin: Acts as a physical barrier preventing pathogens from entering the body.
- Mucus in the gastrointestinal tract: Traps pathogens and helps in their expulsion.
- **Inflammatory Barriers:**
- When tissues are injured, inflammation occurs, which helps to isolate and eliminate pathogens.

4. **Conclusion:**
- All these barriers work together to prevent pathogens from entering the body, making them crucial components of innate immunity.

**Final Answer:**
The factors that do not allow pathogens to enter the body include:
1. Physiological barriers (e.g., stomach acid, saliva)
2. Anatomical barriers (e.g., skin, mucus)
3. Inflammatory barriers