The body's first line of defense includes all of the following EXCEPT
A)intact skin.
B)linings of body cavities.
C)complement.
D)chemical protection.
E)resident populations of microbes.

Question

Quizplus · Accepted Answer

Complement is part of the second line of defense, which involves the immune response, rather than the first line of defense, which includes physical and chemical barriers.

The Body's First Line of Defense Includes All of the Following