The body's first line of defense against invasion of organisms is
A) the skin.
B) white blood cells.
C) chlorination.
D) fever.

Question

Quizplus · Accepted Answer

The skin is the body's first line of defense against invasion of organisms as it acts as a physical barrier and prevents the entry of pathogens into the body. White blood cells, chlorination, and fever are all part of the body's immune response, but are not the first line of defense.

The Body's First Line of Defense Against Invasion of Organisms