Notes : Why do we fall ill? Class 9 Notes | EduRev

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Class 9 : Notes : Why do we fall ill? Class 9 Notes | EduRev

 Page 1


CHAPTER -13 
 
WHY DO WE FALL ILL 
  
 CLASS                             :- IX  
 MADE BY                       :- MANAS MAHAJAN 
 SCHOOL                         :- K.V . GANESHKHIND PUNE-7 
Page 2


CHAPTER -13 
 
WHY DO WE FALL ILL 
  
 CLASS                             :- IX  
 MADE BY                       :- MANAS MAHAJAN 
 SCHOOL                         :- K.V . GANESHKHIND PUNE-7 
1) Health and its failure :- 
     Health is a state of physical, mental and social well being. 
     The conditions necessary for good health are :- 
  i) Good physical and social environment. 
 ii) Good economic conditions. 
iii) Social equality and harmony. 
    Good physical and social environment includes clean 
surroundings, good sanitation, proper garbage disposal and 
clean drinking water .  
   Good economic conditions includes job opportunities for  
all for earning to have nutritious food and  to lead a healthy 
life. 
   Social equality and harmony are necessary for a healthy 
and peaceful life.   
Page 3


CHAPTER -13 
 
WHY DO WE FALL ILL 
  
 CLASS                             :- IX  
 MADE BY                       :- MANAS MAHAJAN 
 SCHOOL                         :- K.V . GANESHKHIND PUNE-7 
1) Health and its failure :- 
     Health is a state of physical, mental and social well being. 
     The conditions necessary for good health are :- 
  i) Good physical and social environment. 
 ii) Good economic conditions. 
iii) Social equality and harmony. 
    Good physical and social environment includes clean 
surroundings, good sanitation, proper garbage disposal and 
clean drinking water .  
   Good economic conditions includes job opportunities for  
all for earning to have nutritious food and  to lead a healthy 
life. 
   Social equality and harmony are necessary for a healthy 
and peaceful life.   
2) Differences between Healthy and Disease free :- 
    
Healthy Disease free 
1. It is a state of physical, 
mental and social well 
being. 
It is a state of absence 
from diseases. 
2. It refers to the 
individual, physical and 
social environment. 
It refers only to the 
individual. 
3. The individual has good 
health. 
The individual may have 
good health or poor health. 
 
Page 4


CHAPTER -13 
 
WHY DO WE FALL ILL 
  
 CLASS                             :- IX  
 MADE BY                       :- MANAS MAHAJAN 
 SCHOOL                         :- K.V . GANESHKHIND PUNE-7 
1) Health and its failure :- 
     Health is a state of physical, mental and social well being. 
     The conditions necessary for good health are :- 
  i) Good physical and social environment. 
 ii) Good economic conditions. 
iii) Social equality and harmony. 
    Good physical and social environment includes clean 
surroundings, good sanitation, proper garbage disposal and 
clean drinking water .  
   Good economic conditions includes job opportunities for  
all for earning to have nutritious food and  to lead a healthy 
life. 
   Social equality and harmony are necessary for a healthy 
and peaceful life.   
2) Differences between Healthy and Disease free :- 
    
Healthy Disease free 
1. It is a state of physical, 
mental and social well 
being. 
It is a state of absence 
from diseases. 
2. It refers to the 
individual, physical and 
social environment. 
It refers only to the 
individual. 
3. The individual has good 
health. 
The individual may have 
good health or poor health. 
 
3) What does disease look like ? 
     When a person is affected by a disease either the normal functioning  
or the appearance of one or more systems of the body changes for the  
worse. These changes give rise to signs of the disease called  
symptoms. 
     On the basis of the symptoms the physicians look for the signs of a  
particular disease and conduct tests to confirm the disease. 
4) Types of diseases :- 
    Diseases are of different types. They are :- 
i) Acute diseases :-  are diseases which last only for a short period 
of time and does not have long term effect on health. 
    Eg:- cold,  cough, typhoid, cholera etc. 
ii) Chronic disease :- are diseases which lasts for a long time and 
has long term drastic effect on health. 
    Eg :- diabetes, tuberculosis, elephantiasis, arthritis, cancer etc.    
Page 5


CHAPTER -13 
 
WHY DO WE FALL ILL 
  
 CLASS                             :- IX  
 MADE BY                       :- MANAS MAHAJAN 
 SCHOOL                         :- K.V . GANESHKHIND PUNE-7 
1) Health and its failure :- 
     Health is a state of physical, mental and social well being. 
     The conditions necessary for good health are :- 
  i) Good physical and social environment. 
 ii) Good economic conditions. 
iii) Social equality and harmony. 
    Good physical and social environment includes clean 
surroundings, good sanitation, proper garbage disposal and 
clean drinking water .  
   Good economic conditions includes job opportunities for  
all for earning to have nutritious food and  to lead a healthy 
life. 
   Social equality and harmony are necessary for a healthy 
and peaceful life.   
2) Differences between Healthy and Disease free :- 
    
Healthy Disease free 
1. It is a state of physical, 
mental and social well 
being. 
It is a state of absence 
from diseases. 
2. It refers to the 
individual, physical and 
social environment. 
It refers only to the 
individual. 
3. The individual has good 
health. 
The individual may have 
good health or poor health. 
 
3) What does disease look like ? 
     When a person is affected by a disease either the normal functioning  
or the appearance of one or more systems of the body changes for the  
worse. These changes give rise to signs of the disease called  
symptoms. 
     On the basis of the symptoms the physicians look for the signs of a  
particular disease and conduct tests to confirm the disease. 
4) Types of diseases :- 
    Diseases are of different types. They are :- 
i) Acute diseases :-  are diseases which last only for a short period 
of time and does not have long term effect on health. 
    Eg:- cold,  cough, typhoid, cholera etc. 
ii) Chronic disease :- are diseases which lasts for a long time and 
has long term drastic effect on health. 
    Eg :- diabetes, tuberculosis, elephantiasis, arthritis, cancer etc.    
 iii) Infectious diseases (Communicable diseases) :- are  
diseases which spread from an infected person to a healthy 
person through air, water, food, vectors, physical contact or 
sexual contact. Eg :- common cold, chicken pox, mumps, 
measles, typhoid, cholera, tuberculosis, malaria, AIDS etc. 
iv) Non-infectious diseases (Non-communicable diseases) :-  
are diseases which are not spread from an infected person to 
a healthy person. Eg :- beri beri, rickets, scurvy, night 
blindness, diabetes, cancer, high blood pressure etc. 
5) Causes of diseases :- 
      Diseases are caused by :- 
  i) Pathogens like virus, bacteria, fungi, protozoans or  
     worms. 
 ii) Poor health and under nourishment. 
iii) Malfunctioning of body parts. 
iv) Environmental pollution. 
v) Genetic disorders. 
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