Multiple Choice
Why is it important that white blood cells are able to travel outside the human circulatory system?
A) To form a complement, white blood cells must leave the circulatory vessels.
B) White blood cells are the antibodies that target parasites.
C) Pathogens may be found in areas of the body other than within circulatory vessels.
D) White blood cells must leave the circulatory system in order to return red blood cells to the circulatory vessels.
Correct Answer:
Verified
Correct Answer:
Verified
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