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Suggest a reason as to why CO is poisono...

Suggest a reason as to why `CO` is poisonous.

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In the lungs, oxygen combines with haemoglobins present in red blood cells to form oxyhaemoglobin
`"Haemoglobin"_0("oxygen")` `hArr` Oxyhaemoglobin
Oxyhaemoglobin travels to different parts of the body through blood stream and releases oxygen which passses on to the various tissues in the boyd. Carbon monoxide is highly poisonous or toxic in nature . its poisonous character is due to its tendency to combine with haemoglobin present in blood to form carboxy haemoglobin which is not in a position to carry the inhaled oxygen to differnt parts in the body. this will lead to suffocation and ultimately to death.
Haemoglobin +CO `rarr` Carboxyhaemoglobin
We may conclude that carbon monoxice reduces the oxygen carrying capacity of haemoglobin.
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