State and explain in brief the four major factors, which are the causes of disease.
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(a) Infection by micro-organisms (bacteria, virus, fungi, protozoa) and worms; cause communicable diseases.
(b) Malfunctioning of body organs; non-communicable diseases like diabetes and heart diseases are caused by the malfunctioning of pancreas and heart respectively.
(c) Deficiency of one or more nutrients;goitre, marasmus and kwashiorkor are such diseases.
(d) Genetic factors present from the birth of the individual; haemophilia is a genetic disease.
(b) Malfunctioning of body organs; non-communicable diseases like diabetes and heart diseases are caused by the malfunctioning of pancreas and heart respectively.
(c) Deficiency of one or more nutrients;goitre, marasmus and kwashiorkor are such diseases.
(d) Genetic factors present from the birth of the individual; haemophilia is a genetic disease.
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Q. 6 B5.0( 1 Vote )
State and explain
Class 9thDr. P.S. Verma & Dr. V.K. Agarwal - Biology5. Why Do We Fall Ill?
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Physical inactivity. - It is one of the main reasons for many diseases
Raised cholesterol. It leads to blocked heart and arteries. It causes damage to cardiac and nervous system
Unhealthy diet - Unhealthy diet leads to malnutrition and excess of nutrition. It damages the body parts and bodily functions
Raised blood glucose. It leads to diabetes and a person has to rely on medicine throughout life.
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