Having a healthy immune system (7-1)

1. Microorganisms2. Through broken skin, mouth or nose3. Generally enters through your nose or mouth4. Mucous cells5. Monocytes6. Shapeless blobs7. Monocytes8. Serves as a barrier that prevents pathogenic organisms

from entering the body.9. Both are ‘cell eaters’ or phagocytes and they are the first white blood cells to defend the body.

White blood cells – 7.2

1. C2. D3. E4. B5. A

6. Through broken skin, Nose and mouth7. Leucocytes8. Phagocytosis9. Erythrocytes, Monocytes10. Basophils11. Eosinophils12. Each move by pushing out a jelly-like arm and pulling the restof the body towards it

8. Leucocyte surrounds a foreign invader with jelly-like arms and eats it.

9. Food contains bacteria, viruses and other foreign invadersand the eating conditions may not be sanitary.There are more invaders after a meal which require morewhite blood cells.

Lymphocytes – 7.8

1. Surrounds and eats2. Fragments3. Membrane4. Key, Lymphocyte5. Recognition sites6. Lock7. Viral8. 39. Yes10. 311. C12. Yes, you can see the capsule fragments13. No, there are no broken capsule fragments

T-8 Lymphocytes (7.11)

1. Cell2. Virus3. Cytotoxic killer cells, Suppressor cells4. They use poison to destroy cells that have already beenInvaded by viruses5. Release chemicals that signals the T4 lymphocytes to stop producing interleukin-2.6. This part of the immune system has the ability to destroyviral factories (cells that have already been invaded by a virus)7. A newborn has not yet established an immune system.The presence of a large thymus gland enables him to producemore T4 and T8 lymphocytes