Chapter 37.2, Problem 4MI

Summary Introduction

To determine:

Nonspecific defense system of different organs.

Introduction:

The immune responses are the reaction of the body’s immune system to fight the pathogen causing organism. The non specific immune system is the immune response which is not specific towards antigen.

Explanation of Solution

The nonspecific defense system of different structures are as follows:

Defense	Mechanism of working
Skin	The skin provides a barrier between the internal structures of the body and environment. This keeps the internal structure safe from the external pathogens and dust.
Saliva, tears and nasal secretion.	These are structures that have chemicals that can kill the external pathogens.
Mucus	Blocks the bacteria that are sticking to the internal epithelium of the body.
Stomach acid	The acid causes the killing of the pathogen with a very low pH that come with food.
Phagocytosis	This is the process, in which any foreign body is digested and converted into smaller pieces by macrophages.
Interferon	These ra ethe chemicals released by an infected cells and causes the increase in antiviral defenses in nearby cells.