Sentence:  As early as 1913 Ghoreyeb and Karsner demonstrated with perfusion studies in <WSD>dogs</WSD> that bronchial artery flow would remain constant at a certain low level when pressure was maintained in the pulmonary artery and vein , but that increases in bronchial artery flow would occur in response to a relative drop in pulmonary artery pressure . 
Meaning of the word marked with <WSD> tags:  a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds