Diseases are caused by germs, poor diet, unhealthy lifestyle or lack of hygiene. They are of two main types: communicable (spread from person to person) and non-communicable (do not spread, like diabetes).
Class 8 Science Curiosity Chapter 3 Health: The Ultimate Treasure NCERT solutions
Class 8 Science Grade 8 Chapter 3 Health: The Ultimate Treasure question answer
Diseases disturb the body’s normal functioning. They can be caused by pathogens like bacteria and viruses or by poor lifestyle, lack of nutrients, pollution and genetics. Diseases are of two types: communicable diseases spread through air, water, food or contact. Non-communicable diseases, like asthma or heart disease, do not spread and are linked to habits or environment. Understanding the cause helps in choosing the right prevention and treatment.
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