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The NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill? have been included in this article. Class 9 Science Chapter 13 Why Do We Fall Ill has the following important concepts:
Download: NCERT Solutions for Class 9 Science Chapter 13 pdf
NCERT Solutions for Class 9 Science Chapter 13
Important Topics for Class 9 Science Chapter 13 Why Do We Fall Ill?
Why do we fall ill? or What causes diseases? These questions cannot be answered in one line. There can be various reasons for falling sick such as lack of personal hygiene, extreme exposure to intense weather, and eating unhealthy foods. An unhealthy lifestyle can also be one of the major reasons for bad health and sickness.
Immune System
| The human immune system includes:
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Types of Diseases
Disease is any condition responsible to impair or worsen good health of any organism, including humans. Diseases interfere with the normal functioning the body has, gradually worseing it.
| Diseases can be divided into two segments:
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Pathogens
A pathogen is any organism, including microbes, that can produce disease. It can simply be defined as an infectious agent, or a germ.
| Pathogens are of different kinds:
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Also Check:
| Important Science Study Guides | ||
|---|---|---|
| Difference between in physics | Physics Constants | Difference between in biology |
| Difference between in chemistry | Named Reactions | Periodic Table |
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