plzzzz answer these questions I have to submit my book tomorrow plzz answer every questions plzz
Answers
(1) Why does a person become tired if there is iron deficiency in his diet ?
Answer :-
Iron deficiency results in the cause of fatigue because the red blood cells become inefficient to carry and transport oxygen to the blood cells.
As a result , the person becomes tired very easily as oxygen is slowly transported.
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(2) Why is gaseous exchange important for man's survival ?
Answer :-
Gaseous exchange helps to excrete the harmful carbon-dioxide from our body.
If carbon-dioxide was not removed from our body , then we would have died.
Hence gaseous exchange is necessary for survival .
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(3) Rate of transpiration is not same all time . Why ?
Answer :-
This is because the weather conditions , the sunlight , the amount of water vapour in the atmosphere is not the same at all time.
It changes from time to time as the rate of the factors that after transpiration also changes from time to time.
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(4) Arteries are thick walled. Give reason .
Answer :-
Blood flows directly from the heart with high pressure and therefore to withstand the huge pressure , arteries are thick walled.
In fact blood is pumped with high pressure because sometimes the blood also travels against gravity.
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Sorry yarr for late answering..........