The four body system which participates in the first line of defense. Concept introduction: First line of defense is the innate and the nonspecific type of defense system, in which a surface protection is composed of physiological and anatomical barriers that prevent the entry of microbes into the sterile compartments of the body. These include tears, saliva, and stomach acid.

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Chapter 12.2, Problem 10AYP

Summary Introduction

To determine:

The four body system which participates in the first line of defense.

Concept introduction:

First line of defense is the innate and the nonspecific type of defense system, in which a surface protection is composed of physiological and anatomical barriers that prevent the entry of microbes into the sterile compartments of the body. These include tears, saliva, and stomach acid.

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