1. _______ fight infections in our body A. white blood cells C. blood platelets B. red blood cells D. plasma 2. _______ clots the blood to prevent bleeding A. white blood cells C. blood platelets B. red blood cells D. hemoglobin 3. _______ carries blood away from the heart A. white blood cells C. blood platelets B. red blood cells D. arteries 4. _______ lack of blood supply to the heart because of narrowed arteries A. Heart disease C. veins B. arteries D. plasma 5. _______ can be caused by obesity (among other things) A. white blood cells C. blood platelets B. red blood cells D. high blood pressure​