Check on google they will give you the answer and others descriptions
It's called hypoxemia, it's low levels of oxygen in the blood, to be more specific, it's oxygen loss in your blood from your arteries. It can cause respiratory disorders, and tissue hypoxia, as a result of the blood not providing much oxygen to your body.
I hope I helped :)
They go to the brain then sent out to the rest of your body
The frontal bone can also be known as the forehead
