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Why do we fall ill (Part - 3) - Science, Class 9 Video Lecture

FAQs on Why do we fall ill (Part - 3) - Science, Class 9 Video Lecture

1. Why do we fall ill?

Ans. We fall ill due to various reasons such as infections caused by pathogens, unhealthy lifestyle choices, poor sanitation, genetic factors, and environmental factors. These factors can weaken our immune system and make us susceptible to illness.

2. What are pathogens?

Ans. Pathogens are microorganisms such as bacteria, viruses, fungi, and parasites that can cause diseases in humans. They can enter our bodies through various means such as contaminated food or water, air droplets, or direct contact with an infected person.

3. How does an unhealthy lifestyle contribute to falling ill?

Ans. Unhealthy lifestyle choices such as a poor diet, lack of exercise, smoking, excessive alcohol consumption, and inadequate sleep can weaken our immune system, making us more prone to falling ill. These habits can also lead to chronic diseases such as obesity, diabetes, and cardiovascular diseases.

4. What role does poor sanitation play in causing illnesses?

Ans. Poor sanitation practices, such as lack of clean drinking water, improper disposal of waste, and inadequate hygiene practices, can lead to the spread of various diseases. Contaminated water and improper waste management can harbor pathogens, which can cause illnesses when ingested or inhaled.

5. Can genetic factors contribute to falling ill?

Ans. Yes, genetic factors can play a role in determining an individual's susceptibility to certain diseases. Certain genetic variations or mutations can increase the risk of developing specific conditions. However, it is important to note that genetic factors alone may not be sufficient to cause an illness, and other environmental or lifestyle factors often interact with genetic predisposition.

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Sep 01, 2025 Last updated

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