Your breathing becomes deeper and faster.
both you can start with breathing out or by breathing in
respiration happens inside the body and breathing happens outside the body
you first breath in and then you breath out
Hopefully, it continues.
It speeds up.
Your breathing speeds up when you exercise in order to get oxygen to your muscles and heart.
It usually slows down
breathing
You hyperventilate.
Your breathing can become laboured due to your smaller lung capacity in high altitudes.
If they are unconscious and breathing, nothing will happen. If they are unconscious and not breathing, they will die.
When breathing in, or inhaling, the diaphragm contracts, or tightens. When exhaling, or breathing out, the diaphragm expands, or loosens.