Why do we fall ill notes class 9
WHY DO WE FALL ILL Noteswala 2020 Notes for why do we fall ill class 9 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. Causes of disease Immediate and Contributory Cause Immediate cause : The organisms that enter our body and cause the disease are termed as an immediate cause. For example, virus, bacteria, protozoa etc. Contributory cause : The secondary f