The three lines of defense your body has against disease include all except?
 a. physical and chemical defenses
 b. inflammation
 c. immune system
 d. scarring 
 a. True 
 b. False b cells and h cells are two important cells in the immune system that help fight infection. antibodies are produced by
 a.b cells
 b. t cells
 c. red blood cells
 d. lymph nodes 1. b 2. true 3. a can you please check ??