| Imported post
I've alway assumed that metallic taste of blood to be due (at least partially) to the iron in the haemoglobin of your red blood cells.
Not sure about the blood vessels dilating in response to O2, I always associate that with NO (nitric oxide), but I'd guess there could be an NO-mediated vasodilation in response to elevated extrinsic O2, will have to check that out.
Steve |