If nitrogen is present in large amount then why we only inhale oxygen and carbon dioxide
Hai!!
It is quite true that when we inhale air, it is not primarily oxygen that gets into our body, but other gases too like nitrogen, it being abundant in the atmosphere. But our body's metabolism is so designed that it accepts only the oxygen molecules. This is due to the MECHANISM OF BIOMOLECULES according to which the body has molecules of various proteins, carbohydrates, etc. Similarly , it has a specefic receptor molecule for just responding to oxygen in the body-the HEAMOGLOBIN!!
It is because of this selective receptiveness exhibited by the body that we talk of just inhaling oxygen. In reality, all gases in the atmosphere enter our lungs. But, it is only oxygen that is accepted by the body
When we exhale, ALL GASES LIKE NITROGEN AND CARBONDIOXIDE are expelled!!
Cheers!!
Hope you understand =)
It is quite true that when we inhale air, it is not primarily oxygen that gets into our body, but other gases too like nitrogen, it being abundant in the atmosphere. But our body's metabolism is so designed that it accepts only the oxygen molecules. This is due to the MECHANISM OF BIOMOLECULES according to which the body has molecules of various proteins, carbohydrates, etc. Similarly , it has a specefic receptor molecule for just responding to oxygen in the body-the HEAMOGLOBIN!!
It is because of this selective receptiveness exhibited by the body that we talk of just inhaling oxygen. In reality, all gases in the atmosphere enter our lungs. But, it is only oxygen that is accepted by the body
When we exhale, ALL GASES LIKE NITROGEN AND CARBONDIOXIDE are expelled!!
Cheers!!
Hope you understand =)