Rheumatoid arthritis is considered a(n) disease because it involves the body mistaking its own healthy cells for invaders and repeatedly attacking them.

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Rheumatoid arthritis is considered a(n) autoimmune disease because it involves the body mistaking its own healthy cells for invaders and repeatedly attacking them.

an autoimmune disease is a condition arising from an abnormal immune response to a normal body part.

Rheumatoid arthritis is considered a disease (n) __autoimmune because it implies that the body confuses its own healthy cells with invaders and attacks them repeatedly.

Explanation:

Rheumatoid arthritis is a chronic and degenerative inflammatory disorder that affects joints and also skin, eyes, lungs, heart and blood vessels. The immune system attacks healthy body cells, which is why it is considered an autoimmune disease.

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