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:
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Q15: The image below depicts Q16: What prevents pathogens from entering our bodies Q17: Complement proteins Q18: A difficult wound for the immune system Q19: Any pathogens that macrophages find indigestible can Q21: Which of the following statements about fighting Q23: Each T cell and each B cell
A)kill invaders.
B)are precursors to antibodies.
C)repel macrophages.
D)break
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