Which of the following is the most important defense mechanism of the external immune system?

Name: Which of the following is the most important defense mechanism of the external immune system?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The skin is the best choice because it serves as the first line defense against infection by physically preventing pathogens from entering the body. Mucous membranes, cilia, and tears are also important defense mechanisms, but they are not as effective at preventing pathogen entry as the skin.

Which of the Following Is the Most Important Defense Mechanism