Sentence:  Amongst the "vessels" of the human body, the <WSD>pipe</WSD> which conveys the saliva from the place where it is made, to the place where it is wanted, deserves to be reckoned amongst the most intelligible pieces of mechanism with which we are acquainted. ... In order to carry the secreted juice to its destination, there is laid from the gland on the outside, a <WSD>pipe</WSD>, about the thickness of a wheat straw, and about three fingers breadth in length; which, after riding over the masseter muscle, bores for itself a hole through the very middle of the cheek; enters by that hole, which is a complete perforation of the buccinator muscle, into the mouth; and there discharges its fluid very copiously. 
Meaning of the word marked with <WSD> tags:  A tubular passageway in the human body such as a blood vessel or the windpipe. (from 14th c.)