Yes, the body uses the oxygen to neutralize lactic acid in the muscles produced by the reaction performed in muscles during exercise so the higher the intensity the more reactions in the muscles take place therefore needing more oxygen to neutralize the acid thus breathing heavier. It is also needed for other purposes but they are fairly obvious...
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The person shows no expressions on their face, eyes are closed, snoring, breathing heavy, no response to questions.
These are diaphragm and externa intercostal muscles in quiet breathing and sternocliedomastoid ,sclene muscles,anterior serrati in heavy breathing
heavy breathing occurs to breathe out the acid (CO2) in an attempt to correct the acidosis.
heavy breathing as you call it , in an engine would mostly be caused by a filthy air cleaner or a blocked air intake
Yes, breathing heavy is the body trying to recover more oxygen. It happens during exercise such as running as your body tries to recover the lost oxygen.
aches in the muscles and heavy breathing
lactation of the nipples and heavy breathing.
dying
Mostly it is considered that heavy breathing is a result of some heavy physical exrcise like Running.But actually it is a result of internal system's usage as a response against any series of incidents/acts.Like when u r eating, or youare in a state of big threat, or sexual intercourse
Heavy breathing can be a sign of many things, including that she may be in labor and ready to have her foal. Heavy breathing most commonly means the horse is uncomfortable or has exercised heavily. Mares who are in labor will breathe heavily. Mares who have a foal inside them that is in an awkward position will also be uncomfortable and sometimes breathe heavily.
If you have a heavy chest feeling that is not tight and you are having no breathing issues, it should still be checked out. It could be something as simple as acid reflux but it could be more severe.