The reduction in the negative effect produced due to cut in the skin with the help of the first line of defence. Introduction: The immune system includes three lines of defense against foreign particle. It is a network of cells, tissues, and organs that protect the body from infection and disease. It has three lines of a defense system against a pathogen that are first, a second and third line of defense. The first line of defence is a type of surface protection. The first line of defense is composed of several physiological and anatomical barriers. It protects the body from invasion of microbes. There are several physical and chemical barriers that are part of the first line of defense.

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Chapter 12, Problem 3CT

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To explain:

The reduction in the negative effect produced due to cut in the skin with the help of the first line of defence.

Introduction:

The immune system includes three lines of defense against foreign particle. It is a network of cells, tissues, and organs that protect the body from infection and disease. It has three lines of a defense system against a pathogen that are first, a second and third line of defense.

The first line of defence is a type of surface protection. The first line of defense is composed of several physiological and anatomical barriers. It protects the body from invasion of microbes. There are several physical and chemical barriers that are part of the first line of defense.

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