What exactly occurs when you faint from lack of oxygen to make your body start breathing again?

Question

This is a question I don’t know how to ask Google about.

In: Biology

Answer 1

Breathing is controlled subconsciously, think of it as autopilot. But if you think about breathing you can consciously control it. If you faint because you held your breath or a panic attack etc and pass out, your subconscious will take over the breathing duties again.