What is oxygen's role in the electron transport chain?
There are a lot of parts and pieces involved in the electron transport chain, but with respect to Oxygen, the simple answer is Oxygen is the place where the electrons go, it i sthe thing that gets reduced.
I'm not going to link to all the membranes and chemical reactions, but rather just refer to something simple like a carbon in a typical fat.
As that carbon sits now, it has a ~ -2 oxidation state.
When you exhale that carbon as
That means for the Carbon:
Those 6 electrons have to go somewhere. And they go onto Oxygen!
You breath in elemental
So that Carbon needs to get rid of 6 electrons...and in
The place were those 6 electrons went is onto the