1. Having a healthy immune system (7-1)
Microorganisms
Through broken skin, mouth or nose
Generally enters through your nose or mouth
Mucous cells
Monocytes
Shapeless blobs
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.

2. White blood cells – 7.2 C D E B A
Through broken skin, Nose and mouth
Leucocytes
Phagocytosis
Erythrocytes, Monocytes
Basophils
Eosinophils
Each move by pushing out a jelly-like arm and pulling the rest
of the body towards it

3. 8. Leucocyte surrounds a foreign invader with jelly-like
arms and eats it.
9. Food contains bacteria, viruses and other foreign invaders
and the eating conditions may not be sanitary.
There are more invaders after a meal which require more
white blood cells.

4. Lymphocytes – 7.8
Surrounds and eats
Fragments
Membrane
Key, Lymphocyte
Recognition sites
Lock
Viral 3
Yes C
Yes, you can see the capsule fragments
No, there are no broken capsule fragments

5. T-8 Lymphocytes (7.11)
Cell
Virus
Cytotoxic killer cells, Suppressor cells
They use poison to destroy cells that have already been
Invaded by viruses
5. Release chemicals that signals the T4 lymphocytes to stop
producing interleukin-2.
6. This part of the immune system has the ability to destroy
viral 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 produce
more T4 and T8 lymphocytes