Question

(6) State and explain in brief the four major factors, which are causes of disease.​

Answer 1

Answer:

masqitoes may cause malaria

Answer 2

Answer:

(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.

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