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Jugar Test
1. 
What three items make up the Immune System?
A.
organs, blood, white blood
B.
organs, tissues, and cells
C.
bones, blood, and joints
2. 
Diseases are caused what?
A.
germs and blood
B.
bacteria and virus
3. 
Where are viruses produced?
4. 
People are born with certain illness.
A.
True
B.
False
5. 
White blood cells do not fight off diseases.
A.
True
B.
False