How does blood transport oxygen throughout the body?

Answer:
Blood cells contain hemoglobin (a protein with iron in it) that binds to oxygen such that it releases the oxygen as pH decreases. This is a good thing as active tissue release C02 which increases the free H+ thus effectively moving oxygen from the lungs to the active tissue.
First answer by Ilantoren. Last edit by Ilantoren. Contributor trust: 391 [recommend contributor recommended]. Question popularity: 2 [recommend question].