PPT on Why Do We Fall ILL Science Class 9th

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                                                          PPT METARIAL

CHAPTER

WHY DO WE FALL ILL

W H A T  IS H E A L T H

Health is the level of functional or metabolic efficiency of a living organism. In humans, it is the general condition of a person’s mind and body, usually meaning to be free from illness, injury or pain

(as in “good health” or “healthy”).

 Difference between Healthy and Disease Free

HEALTHY                         

1). It is a state of physical,mental and social wellbeing .

2). It refers to the individual, physical and social environment. 

3). The individual has good health.

DISEASE FREE

1). It is a state of absence from disease.

2). The individual many have good health or poor health.

3). It refers individual.

PRINCIPLES OF PREVENTION OF DISEASE

Water borne microbes

We can prevent  exposure by providing      safe drinking water.

AIR borne microbes

We can prevent exposure by providing conditions that are not over crowded

vector borne   infections

We can provide clean environment, for example, would not allow mosquito breeding.

HOW DISEASES 

SPREAD?

Nose, mouth or hands to other

Germs can spread to the hands by sneezing, coughing, or rubbing the eyes and then can be transferred to other family members or friends. Simply washing your hands can help prevent such illnesses as the common cold or eye infections.

AIRBORNE

 TRANSMISSION

The infectious agent many be transmitted in dried secretions from the respiratory tract, which can remain suspended in the air for some time. For example, the infectious agent causing  T.B can   enter a new host through airborne transmission.

INDIRECT TRANSMISSION

Indirect transmission is when infectious agents are transmitted such as air, food, water, objects or substances in the environment, or other animals. Indirect transmission has three sub types:

DIRECT 

TRANSMISSION

Refers to the transfer of an infectious agent from an infected host to a new host, without need for intermediates such as air, food, water, or other animals.

Direct modes of transmission can occur in many ways.

TOUCHING

DIRECT PROJECTION OF DROPLETS

SEXUAL INTERCOURSE

BITING

ACROSS THE PLACENTA.

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