How is oxygen distributed to cells in the body? Please add details!?

Question

How is oxygen distributed to cells in the body? Please add details!?

Answer 1

when you breathe in, oxygen enters your lungs and collides with the allvillie,  it moves through these and bonds to the hemoglobin on your blood cells making them turn red(iron oxide)  the blood cells arepumped through your body by the heart through all the veins and capillaries where the oxygen becomes unbonded and enters a cell

Answer 2

You breathe in oxygen through the nose, it goes into the trachea, this branches into 2 bronchus (left lung, right lung). These branch into hundreds of bronchioles in your lungs. On the end of the bronchioles there are alveoli (air sacs). These are covered in capillaries. The O2 diffuses into the capillaries.

The hemoglobin molecule in the blood cell is the O2 carrier. It is made up of 4 heme groups. In the center of heme is an iron ion. The oxygen attaches to the iron. The blood is pumped through the body and O2 detaches when required.