What are autoimmune disorders ?

Explanation

### Step-by-Step Text Solution

1. **Definition of Autoimmune Disorders**: Autoimmune disorders are conditions in which the immune system mistakenly attacks the body's own healthy cells. This occurs because the immune system fails to differentiate between foreign pathogens (like bacteria and viruses) and the body’s own cells.

2. **Mechanism of Action**: Normally, the immune system is designed to identify and destroy foreign invaders to protect the body from infections. However, in autoimmune disorders, this mechanism malfunctions, leading the immune system to target and damage healthy tissues instead.

3. **Examples of Autoimmune Disorders**:
- **Rheumatoid Arthritis**: This is one of the most common autoimmune disorders. It primarily affects the joints, causing inflammation, pain, and swelling in the joint lining.
...