How does saliva act in self-defence?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Saliva and Its Components**: Saliva is a fluid produced in the mouth that plays a crucial role in digestion and oral health. It contains various components, including enzymes, electrolytes, and antimicrobial agents.

2. **Role of Lysozyme**: One of the key enzymes present in saliva is lysozyme. This enzyme has antibacterial properties and is essential for the body’s defense mechanism against pathogens.

3. **Mechanism of Action**: Lysozyme acts by targeting the cell walls of bacteria. It is phagocytic in nature, meaning it can engulf bacteria. Once the bacteria are engulfed, lysozyme facilitates the breakdown of their cell walls.

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