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Duct   /dəkt/   Listen
Duct

noun
1.
A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance.  Synonyms: canal, channel, epithelial duct.  "The alimentary canal" , "Poison is released through a channel in the snake's fangs"
2.
A continuous tube formed by a row of elongated cells lacking intervening end walls.
3.
An enclosed conduit for a fluid.



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"Duct" Quotes from Famous Books



... fluid in a day to the liver's two or three pints; yet witness our medieval solicitude for the liver, for one among many organs. The liver is located near the upper portion of the intestinal canal and connected by a tube (the bile duct) to the rest of the excursion route. The following liver-persuading knights-errant are prescribed and ordered by disciples of Hippocrates, Galen, Herodicus, and Iccus, to treat with that digestive and eliminative monarch, ...
— Intestinal Ills • Alcinous Burton Jamison

... We shall discuss the structure and action of -a gland- [glands] a little more fully in a subsequent chapter. Here we will simply say that they are organs forming each its characteristic fluid or secretion, and sending it by a conduit, the duct, to the point where its presence is required. The saliva in our mouths, tears, and perspiration, are examples of ...
— Text Book of Biology, Part 1: Vertebrata • H. G. Wells

... was entrusted to Admiral Keppel, and he put to sea with twenty sail ot the line for that purpose. On the 17th of June, Keppel discovered two French frigates, the "La Licorne" and "La Belle Poule," reconnoitring his fleet. The con duct of France seemed to call for and to justify extreme measures, and Keppel's instructions being ample, he resolved to effect the capture of these two frigates. Accordingly they were chased, and the first, fired both with cannon ...
— The History of England in Three Volumes, Vol.III. - From George III. to Victoria • E. Farr and E. H. Nolan

... (villi), through which the food passes into a blood stream leading to the liver, where the blood is then purified. These projections also contain lacteals or little vessels containing blood without its red corpuscles. A duct carries this colourless blood mixed with absorbed food to the left side of the neck, where it empties into the blood stream. These lacteals have a special affinity for the fat of the food. Most of the rest of the food, including the proteid and the carbohydrate or starchy portion now in the form ...
— Papers on Health • John Kirk

... ink, among them a brown color, sepia, in Hebrew tekeleth. As a natural ink its origin antedates every other ink, artificial or otherwise, in the world. It is a black-brown liquor, secreted by a small gland into an oval pouch, and through a connecting duct is ejected at will by the cuttle fish which inhabits the seas of Europe, especially the Mediterranean. These fish constantly employ the contents of their "ink bags" to discolor the water, when in the presence of enemies, in order to ...
— Forty Centuries of Ink • David N. Carvalho


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