{TAIL ~ A flow generator} coupled to a gas delivery system delivers breathable gas to {HEAD ~ the patients airway} 
{ TAIL ~ A flow generator } coupled to a gas delivery system delivers breathable gas to { HEAD ~ the patients airway }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD