...It may also arise from the presence of parasites orgallstones in the ducts, forming a mechanical obstruction to the onward flow ofbile... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The lobules are held together by a small amount of fibrous tissue, inwhich the bile ducts and larger blood vessels are lodged...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Injuries received during parturition,stoppage of the milk ducts, and infection of the umbilicus in the newly bornare also frequent causes of pyemia...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The larger milk ducts contain yellowish, cheesyparticles, in which are many tubercle bacilli...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Small cheesy foci and yellowish lines of tuberculous materialfollow the course of the milk ducts...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...A flowing thing, shapeless and nameless, is all that the animal is, if we add abundant ramified air ducts, some nervous filaments and, under the skin, a thin layer of muscular fibers...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The budsswell on every chance-spared twig, andsap starts from the severed ducts...
Rowland E. Robinson 「In New England Fields and Woods」
...These relatechiefly to the prorenal ducts and the first blood-vessels...
Ernst Haeckel 「The Evolution of Man」
...The plant rootlets inmost cases followed the large ducts that run lengthwise through the pieces of woodand take up the greater part of the space...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
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