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The helmetlike case in the skull called ______________
A. cranium
B. facial bones
C. vertebrae
D. sternum
Select your answer:
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Body Defense › ViewWhat is the name given to the substances in your tears that can destroy pathogens?
A. lysozymes
B. enzymes
C. tears
World Health Day › View
Germs are _____.
A. Not harmful to the human body
B. Very small, microscopic living things that can enter your body and make you sick
C. So big that you can obviously see them and prevent them from entering your body and making you sick