What changes take place to a red blood cell as it matures? What is the structure and function of ...

as a red blood cell matures it loses its nucleus and becomes full of hemoglobin

Hemoglobin: iron and protein.

composed of 4 subunits (4 peptide chains), each consisting of heme and globin. Heme contains an iron atom, globin contains two alpha and two beta polypeptide chains (Bind 4 oxygen (oxyhemoglobin)). Binding occurs in areas of high oxygen concentration or neutral pH. Oxygen release (deoxyhemoglobin) occurs in areas of low oxygen concentration or a low, or acidic pH. Binds carbon dioxide.

Carbon Monoxide is so dangerous because the body may not even notice it has gotten into the blood.  Generally your Blood Cells carry oxygen throughout the body.  The issue is that the body cannot tell the difference between CO and Oxygen.  Therefore, CO can attach itself to the blood cells and travel through the body.  When this happens, the body does not get the oxygen it needs and can cause the dizziness and passing out.

At this point, the body cannot bring in new oxygen, which can lead to death if not treated which is why it is very important to call for help.

When exposed to high levels, it may be required to be put in a Hyperbaric Chamber to allow oxygen to be forced back onto the blood.