CBSE Class 9 Why do we fall ill. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations.
Why do we fall ill
1.”Health” is a state of being well enough to function well physically, mentally, and socially.
2.”Disease”( disturbed ease) means being uncomfortable. One or more systems of the body will change, give rise to “Symptoms” ( Cough, loose motions, pus formation, headache, fever, breathlessness, vomiting, fits, unconsciousness, inflammation , swelling and general effects - a Doctor look for the basis of symptoms). Diseases are basically two types- Acute Disease & Chronic Disease
3. Acute Disease: The disease which lasts for only a short period of time is called Acute Disease Ex. Common Cold.
4.Chronic Disease: The disease which lasts for long period of time is called Chronic Disease Ex. Tuberculosis.
5. Causes of Diseases : Most of the diseases have many causes, rather than one single cause, like unclean water, nourishment, genetic differences, genetic abnormalities e.g. Based on the causes diseases are of two types: Non-Infectious Diseases and Infectious Diseases.
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