[Free Registration/Login may be required to access all resource tools.] Joint pain. Not an uncommon problem as you grow older. Is it due to normal wear and tear on the joints? Possibly. But rheumatoid arthritis is an autoimmune disease, which means the body's immune system mistakenly attacks healthy tissue. In the following tutorial you will begin to understand how autoimmune diseases affect the body.

Concepts

antigens, pathogens, multiple sclerosis

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Additional Tags

autoimmune diseases, ck-12 episd, rheumatoid arthritis, systemic lupus erythematosus, type i diabetes, noncommunicable diseases and disorders

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Classroom Considerations

• Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)