duct (dukt) a passage with well-defined walls, especially a tubular structure for the passage of excretions or secretions.duc´tal
bile duct.
aberrant duct any duct that is not usually present or that takes an unusual course or direction.
alveolar ducts small passages connecting the respiratory bronchioles and alveolar sacs.
Bartholin's duct the larger of the sublingual ducts, which opens into the submandibular duct.
Bellini's duct papillary d.
bile duct
1. any of the passages that convey bile in and from the liver.
biliary duct bile d.
branchial ducts the drawn-out branchial grooves which open into the temporary cervical sinus of the embryo.
cochlear duct a spiral tube in the bony canal of the cochlea, divided into the scala tympani and scala vestibuli by the lamina spiralis.
common bile duct the duct formed by the union of the cystic and hepatic ducts.
ducts of Cuvier two short venous trunks in the fetus opening into the atrium of the heart; the right one becomes the superior vena cava.
cystic duct the passage connecting the gallbladder neck and the common bile duct.
deferent duct ductus deferens.
efferent duct any duct which gives outlet to a glandular secretion.
ejaculatory duct the duct formed by union of the ductus deferens and the duct of the seminal vesicle, opening into the prostatic urethra on the colliculus seminalis.
endolymphatic duct a canal connecting the membranous labyrinth of the ear with the endolymphatic sac.
duct of epididymis the single tube into which the coiled ends of the efferent ductules of the testis open; its convolutions make up most of the epididymis.
excretory duct one that is merely conductive and not secretory.
genital duct see under canal.
hepatic duct the excretory duct of the liver (common hepatic d.), or one of its branches in the lobes of the liver (left and right hepatic d's). 
)
interlobular ducts channels between different lobules of a gland.
lacrimal duct see under canaliculus.
lactiferous ducts ducts conveying the milk secreted by the mammary lobes to and through the nipples.
Luschka's ducts tubular structures in the wall of the gallbladder; some are connected with bile ducts, but none with the lumen of the gallbladder.
lymphatic ducts channels for conducting lymph.
lymphatic duct, left thoracic d.
lymphatic duct, right a vessel draining lymph from the upper right side of the body, receiving lymph from the right subclavian, jugular, and mediastinal trunks when those vessels do not open independently into the right brachiocephalic vein.
mesonephric duct an embryonic duct of the mesonephros, which in the male develops into the epididymis, ductus deferens and its ampulla, seminal vesicles, and ejaculatory duct and in the female is largely obliterated.
duct of Müller , müllerian duct paramesonephric d.
nasolacrimal duct the canal conveying the tears from the lacrimal sac to the inferior meatus of the nose.
omphalomesenteric duct yolk stalk.
pancreatic duct the main excretory duct of the pancreas, which usually unites with the common bile duct before entering the duodenum.
papillary duct a wide terminal tubule in the renal pyramid, formed by union of several straight collecting tubules and emptying into the renal pelvis.
paramesonephric duct either of the paired embryonic ducts developing into the uterine tubes, uterus, and vagina in the female and becoming largely obliterated in the male.
paraurethral ducts of female urethra inconstantly present ducts in the female, which drain a group of the urethral glands into the vestibule.
paraurethral ducts of male urethra the ducts of the urethral glands situated in the spongy portion of the male urethra.
parotid duct the duct by which the parotid gland empties into the mouth.
perilymphatic duct cochlear aqueduct.
pronephric duct the duct of the pronephros, which later serves as the mesonephric duct.
ducts of prostate gland , prostatic ducts see under ductule.
ducts of Rivinus the small sublingual ducts which open into the mouth on the sublingual fold.
duct of Santorini a small inconstant duct draining a part of the head of the pancreas into the minor duodenal papilla.
secretory duct a smaller duct that is tributary to an excretory duct of a gland and that also has a secretory function.
semicircular ducts the long ducts of the membranous labyrinth of the ear.
seminal ducts the passages for conveyance of spermatozoa and semen.
spermatic duct ductus deferens.
duct of Steno , Stensen's duct parotid d.
submandibular duct , submaxillary duct of Wharton the duct that drains the submandibular gland and opens at the sublingual caruncle.
tear ducts the ducts conveying the secretion of the lacrimal glands.
thoracic duct the canal that ascends from the cisterna chyli to the junction of the left subclavian and left internal jugular veins.
thyroglossal duct , thyrolingual duct an embryonic duct extending between the thyroid primordium and the posterior tongue.
urogenital ducts the paramesonephric and mesonephric ducts.
Wharton's duct submandibular d.
duct of Wirsung pancreatic d.
wolffian duct mesonephric d.
| bile duct or biliary duct n. Any of the excretory ducts in the liver that convey bile between the liver and the intestine, including the hepatic, cystic, and common bile ducts. Also called gall duct. |
bile duct.
See biliary duct.
bile duct
1. generally, any of the biliary passages.
2. specifically the terminal segment of the biliary tree extending from the union of the common hepatic duct and cystic duct to the major duodenal papilla. See also bile passages.
bile duct atresia
if it is extensive it causes jaundice and steatorrhea soon after birth. It is observed rarely in kittens and puppies.
bile duct calculi
see cholelithiasis.
bile duct canaliculi
formed between adjacent hepatocytes these are the smallest components of the biliary system; they open into biliary ductules.
bile duct carcinoma
see cholangiocellular carcinoma.
bile duct cysts
occur in all species and are probably derived from occluded or atretic embryonic bile ducts.
bile duct ductule
bile duct.
bile duct dyskinesia
a much-argued diagnosis in human medicine. The diagnosis assumes that there is a failure of biliary flow into the intestine for other than physical reasons. The hypothesis likens the problem to that of irritable colon. There is no proof of the existence of the malfunction in humans, much less in animals.
bile duct fibrosis
a common severe lesion, accompanied by mineralization, as a result of infestation by Fasciola hepatica.
bile duct hyperplasia
may be part of a general reaction of the liver but is most important as a purely cholangiolar proliferation, usually as a result of exposure to a poison such as butter yellow.
bile duct inflammation
see cholangiohepatitis.
bile duct obstruction
see biliary obstruction.
bile duct proliferation
see bile duct hyperplasia (above).
bile duct radiology
see cholangiography.
bile duct rupture/perforation
most ruptures are traumatic and result in leakage of bile into the peritoneal cavity. See also biliary peritonitis.
bile duct tumors
see cholangiocellular.
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|