Which of the following lists the body's first, second, and third lines of defense in order?
A) Adaptive immunity, external innate immunity, internal immunity
B) External innate immunity, internal innate immunity, adaptive immunity
C) External innate immunity, adaptive immunity, internal innate immunity
D) External adaptive immunity, internal adaptive immunity, innate immunity
E) Innate immunity, internal adaptive immunity, internal innate immunity

Question

Quizplus · Accepted Answer

The body's first line of defense is external innate immunity (e.g., skin, mucous membranes), the second line is internal innate immunity (e.g., phagocytes, inflammation), and the third line is adaptive immunity (e.g., lymphocytes, antibodies).

Which of the Following Lists the Body's First, Second, and Third