Question

name two important components in our body that contains nitrogen and oxygen​

Answer 1

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As far as my understanding goes, we humans do inhale nitrogen along with oxygen. But, we cannot directly assimilate the atmospheric nitrogen into our body, like plants, and so we exhale it out.

One of the reasons behind this is that humans don’t have any nitrogen binder in the body, like it has for oxygen (i.e. hemoglobin). Another reason is that nitrogen is not as reactive as oxygen, hence nitrogen is not as helpful in the metabolic processes of the body as oxygen.

However, some microorganisms, like the bacteria ‘Rhizobium’ do have particular enzymes which can fix the atmospheric nitrogen and provide it to the plants in a usable form. But since we don’t have the enzymes to break the strong triple bond of nitrogen we cannot directly assimilate nitrogen from air but rather take it in

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some other forms.

Therefore, even though there is high percentage of nitrogen in atmosphere, we don’t directly breathe in nitrogen.