The opening of {TAIL ~ the exhaust system} may also have a tubing to allow {HEAD ~ the exhaled air} to be moved even further away 
The opening of { TAIL ~ the exhaust system } may also have a tubing to allow { HEAD ~ the exhaled air } to be moved even further away
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH