Components of the first line of defense include all of the following except

Question

Quizplus · Accepted Answer

All of the other options listed are components of the first line of defense, while phagocytic white blood cells are part of the second line of defense. The first line of defense includes physical and chemical barriers that prevent pathogens from entering the body, while the second line of defense includes immune cells and processes that actively attack and eliminate pathogens that have entered the body.

Components of the First Line of Defense Include All of the Following