Arrange the three lines of defense from the first to the last. 1 = Adaptive immune system
2 = Physical barriers
3 = Innate immune system

Question

Quizplus · Accepted Answer

The correct order is: 2) Physical barriers (first line of defense), 3) Innate immune system (second line of defense), and 1) Adaptive immune system (third line of defense). Physical barriers include skin and mucous membranes, the innate immune system involves non-specific responses, and the adaptive immune system includes specific responses to pathogens.

Arrange the Three Lines of Defense from the First to the Last