Question

Hey!!!! Is anyone have notes of 'Why do we fall ill' chapter?
plz send​

Answer 1

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Health is the stage under which physical, mental and social work is done by proper capacity To be done properly.

• The health of all organisms is based on its neighborhood or its surrounding

environment

Our physical environment is determined by the social environment. Physical environment means the weather, temperature, pollution, cleanliness, dirt etc. there, • Community hygiene is very important for personal health.

Good economic conditions and work are also essential for personal health

To be healthy, we need to be happy If our behavior is not good with anyone and each other We cannot be happy and healthy if we are afraid of it. So for personal health

Lots of social equality 3is shyaak

• The opportunity to achieve your specific potential is also essential for real health • Personal cleanliness and health environment and health of the person is necessary for immunity

Food When there is a disease, then one or several organs and systems of the body have detect in action or structure

Begins to be reflected

Headache, cough, cold, fever, stomachache diarrhea and vomiting are symptoms of the disease,

not the disease

• Symptoms give definite indication about a particular disease. Diseases are identified by looking at them Laboratory tests are also done for this.

- Diseases whose duration is short are called acute diseases. Such as - Cough, cold, diarrhea etc..

There are diseases that last for a long period or after life, such diseases are called long term diseases. Examples

Elephantitis or Phyllopan etc. • Proper functioning of all body parts is essential for general health.

• Acute disease, which lasts for a very short time, has no time to affect general health. Get it. • Long-term disease, because it remains in the body for a long time, it affects our general

health. Such as, loss of weight, feeling tired, other disturbances, etc. All diseases

have immediate causes and contributory causes. As well as having a variety of diseases

But there are many reasons. Diseases that have immediate microorganisms are called infectious diseases. Examples-tetanus, cholera,

Plague, typhoid etc

Some diseases that are not caused by micro-organisms are caused by other factors called non-communicable diseases.

Examples - Caesars, obesity, high blood pressure etc.

A bacterium called Helicobacter pylori is the cause of peptic ulcer.. Factors of infectious diseases are organisms, some bacteria, fungi, unicellular animals and some

protozoa, some multicellular organisms such as worms, plenaria etc.

• Disease caused by viruses - cough, cold, influenza, dengue fever and AIDS etc. • Diseases caused by bacteria (typhoid, cholera tuberculosis (tuberculosis) and anthrax etc.

All • common skin diseases

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I hope you have helped with this answer.

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hyy mea same class mea bhi 9th mea hu but fark aetna hai ham Hindi medium hai or aap English medium mea

Answer 2

Main topics covered in this part of CBSE Class 9 Science, Why Do We Fall Ill: Chapter Notes, are:

• Health
• Disease and its Types
• Causes of disease
• Antibiotics
• Principle of Treatment
• Principles of Prevention

Health:

Health is a state of complete physical, mental and social wellbeing.

Disease:

Any disturbance in the structure or function of any organ or part of body.

It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services.

Types of Disease

Diseases are basically of two types. They are:

(i) Acute Disease

The disease which lasts for only a short period of time is called Acute Disease.

For example: Influenza (Flu), Common cold, etc.

(ii) Chronic Disease:

The disease which lasts for a long period of time is called Chronic Disease

For example: TB, Cancer, etc.

Difference between Acute Disease & Chronic Disease

Acute Disease:

1. They are short duration diseases.

2.Patient recovers completely after the cure.

3. There is no loss of weight or feeling of tiredness afterward.

4. There is short-duration loss of work and efficiency.

Chronic Disease:

1. They are long lasting diseases.

2. Patient does not recover completely.

3. There is often loss of weight of feeling of tiredness.

4. There is a prolonged loss of work and efficiency.

Causes of diseases are explained below:

Immediate and Contributory Cause

• Immediate cause

• Infectious causes

They include the agents like microbes or micro-organisms as the immediate causes which spread the disease from an infected person to a healthy person.

• Non-infectious causes

• Non-infectious causes

Infectious Diseases:

The diseases which spread due to infection by micro-organisms are called infectious diseases.

When a disease causing organism enters our body it causes infection, it multiplies and grows in the body called host and micro-organisms multiplies in the host body.

For example: Tuberculosis, tetanus, Common cold, AIDS, etc.

Non-infectious Diseases:

The disease which does not spread by contact between infected and healthy person through air and water, is called non-infectious disease.

For example: Cancer, genetic abnormalities, high blood pressure, etc.

Antibiotics

These are the chemicals (medicine, drugs) that block biochemical pathways important for bacteria. They are used for diseases caused by bacteria.

Antibiotics do not work against viral infections as the viruses do not have their own biochemical mechanisms but depend upon that of the host.

Principles of treatment

1. To reduce the effects of the diseases

By taking medicines to bring down the effects of the disease like fever, pain, etc. and by taking complete rest to conserve the body’s energy.

2. To kill the cause of the disease

By taking suitable antibiotics and drugs which kill the disease causing microbes.

Principles of Prevention

1. General method:

They involve (a) Preventing exposure against microbes (b) By boosting the immune system

(a) Preventing exposure against microbes can be done in the following ways:

For air-born microbes we can prevent exposure by avoiding overcrowded places. For water-borne microbes we can prevent exposure by not using contaminated water.

For vector-borne infections we can prevent exposure by providing a clean environment.

(b) By boosting the immune system:

Our immune system plays an important role in fighting against the microbes that enter our body. strengthening the immune system can help in preventing many diseases.

So, proper nourishment or healthy diet that includes all the necessary nutrients as well as vitamins and minerals is necessary for better functioning of our immune system.

2. Specific method

It involves the prevention method directed against a particular disease.

It is done by immunisation which is the process of introducing a weakened pathogen inside the body of the host to make his/her immune system to produce antibodies against that particular disease so that the next time even if the disease will strike the host’s body with full vigor, the body will be able to protect itself with the help of these antibodies.

Try the following questions:

Q1. What is called vector. Give one example.

Q2. What is Vaccination? Give the details, how it works in human body.

Q3. State any two conditions essential for good health.

Q4. Differentiate between communicable and non-communicable diseases. Give one example of each.

Q5. Name the pathogens which can cause acne and sleeping sickness.

Q7. What are the different means by which infectious diseases are spread?

Q8. What do you mean by active and passive immunisation?

Q9. State two principles of treatment of a disease.

Q10. Why making anti-viral medicines is harder than making anti-bacterial medicines?