sentences: rheumatoid arthritis occurs when the body attacks its own tissues & an autoimmune disease is when the body attacks its own tissues -> rheumatoid power is a mean of autoimmune health rheumatoid arthritis is a kind of autoimmune disease  rheumatoid arthritis is a kind of autoimmune disease & a disordered immune system causes autoimmune diseases & if something is caused by something else, then that something else will happen second before that something -> rheumatoid arthritis is caused by a disordered immune system rheumatoid arthritis is caused by a disordered immune system  rheumatoid breathing is caused by a disordered vulnerable solids -> the immune system becomes disordered first before rheumatoid arthritis occurs