Opening our mouths is the best and foremost method for drawing in a huge breath filled with oxygen. We need oxygen because it prepares our muscles to either fight or run away in a ‘flight or fight’ response. We have this response when we come across some trigger that invoke fear or surprise. When faced with a dangerous situation, our body’s involuntary action releases stress hormones. These hormones may cause increased blood flow, fast breathing and contracted muscles. All require a boost of adrenaline and energy, and oxygen assists in increasing these tasks.
Why do our mouths literally ‘fall open’ when we are shocked?
