Question

pls ..urgent lecture of why do we fall ill

Answer 1

Every person get ill and there are many reason behind it. Our whole body function is totally dependent on the function of our body cell and tissues. Our RBCs and WBCs are the main defence of our body. And the most imp. Are the Basophils although they are 1% in our body but it help our cells to fight with the dangerous disease.
When our defending cell are totally damaged we get sick/ill.
...Thank you. :-)

Answer 2

first of all health is a state of complete physical mental and social well being and not merely an absence of disease . It is a state of body when all the organs are performing properly and a perfect balance is maintained.
but it is been affected. and that is by a disease. A disease is a condition which interferes with the normal functioning of the body.