Why is It Important That White Blood Cells are Able

Question

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.

Accepted Answer

Pathogens can enter the body through various routes such as through the respiratory system or by entering a wound. Once inside the body, these pathogens do not stay confined to the circulatory vessels. Therefore, white blood cells need to be able to leave the circulatory system to reach these areas and fight off the pathogens. This is why it is important that white blood cells can travel outside the human circulatory system.