The pulmonary arterial conduits are looked upon by the ancient anatomists as notorious shape-shifters. They are viewed as demons endowed with the power to change form in accordance with the form of the bronchi. The various forms they assume match the rank and the designation of the bronchial conduits. For smaller bronchi smaller forms are assumed and for larger ones larger; the pulmonary arterial conduit moves exactly in sync with the bronchus.
The bronchioles are matched by the pulmonary arterioles and the respiratory bronchioles by the smaller arterioles in the acinar zone. It is as if the pulmonary arterial conduit is some kind of a great sorcerer or magician, having the power to take on any form of the earthly (bronchial) realm that it wishes. It can be viewed as either personally taking on or sending a subordinate member of the network to assume the form of any member of the bronchial realm.
The tremendous representative capacity of poetical language is utilized to the hilt here; and it is almost as if the poet himself has decided to don the sorcerer's mantle in a bid to match the anatomist!
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