The respiratory conduit includes {TAIL ~ at least two volumes}, wherein one volume is positioned between {HEAD ~ a first air flow control device} and a second air flow control device and another volume is positioned between a second air flow control device and a third air flow control device 
The respiratory conduit includes { TAIL ~ at least two volumes } , wherein one volume is positioned between { HEAD ~ a first air flow control device } and a second air flow control device and another volume is positioned between a second air flow control device and a third air flow control device
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH