Question

12) List the 3 ways your body protects from infections.

Answer 1

12) 1) Skin and mucous membranes 
      2) White blood cells     
      3)The immune system and blood cells

13)The primary boundary is your skin, but almost every organ has some defense against germ infection.

14) false

15) true

16) rid the body of toxins, waste and other unwanted materials which you can say is dirt

17) A lymph node may swell in response to an infection somewhere in your body.

18) true

19) c.red blood cells

20) false

21) true

22) true

23) true

Answer 2

12.1 The acid in the stomach destroys microbes. 
12.2 The skin prevents microbes from getting into the body.
12.3 Sticky mucus in the lungs nets microbes, and then cilia span it out of the lungs
13. D. Skin
14. False - Mucos prevents microbes in certain organs
15. False - It is a colorless fluid. 
16. A. Bacteria
17. B1
8. False -  Thymus in the anterior part of the chest directly behind the sternum between the lungs
19. C. Red blood cells
20. False - Bone marrow produces the known blood cells
21. True
22. False - It starts in the bone marrow. 
23. True