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How does the body protect itself from these invaders?

A. The immune system kills or disables the invading organisms.

B. The respiratory system surrounds the invaders with carbon dioxide.

C. The respiratory system removes invaders from the blood.

D. The immune system collects and stores the invading organisms.

User Loganathan
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1 Answer

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A - the white blood cells collect the invaders through phagocytosis and kills them 
User Galdre
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