| ductus nodes | The highest nodes in a left pneumonectomy specimen that lie on the upper aspect of the left main branches and are accessed by dividing the ligamentum arteriosum. (05 Mar 2000) |
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| ductus pancreaticus | The excretory duct of the pancreas that extends through the gland from tail to head where it empties into the duodenum at the greater duodenal papilla. Synonym: ductus pancreaticus, Hoffmann's duct, Wirsung's canal, Wirsung's duct. (05 Mar 2000) |
| ductus pancreaticus accessorius | The excretory duct of the head of the pancreas, one branch of which joins the pancreatic duct, the other opening independently into the duodenum at the lesser duodenal papilla. Synonym: ductus pancreaticus accessorius, Bernard's canal, Bernard's duct, ductus dorsopancreaticus, Santorini's canal, Santorini's duct. (05 Mar 2000) |
| ductus paramesonephricus | Either of the two paired embryonic tubes extending along the mesonephros roughly parallel to the mesonephric duct and emptying into the cloaca; in the female, the upper parts of the ducts form the uterine tubes, while the lower fuse to form the uterus and part of the vagina; in the male, vestiges of the ducts form the vagina masculina and the appendix testis. Synonym: ductus paramesonephricus, Muller's duct, mullerian duct. (05 Mar 2000) |
| ductus paraurethrales | Inconstant ducts along the side of the female urethra that convey the mucoid secretion of Skene's glands to the vestibule. Synonym: ductus paraurethrales, ducts of Skene's glands, Schuller's ducts. (05 Mar 2000) |
| ductus parotideus | The duct of the parotid gland opening from the cheek into the vestibule of the mouth opposite the neck of the superior second molar tooth. Synonym: ductus parotideus, Blasius' duct, Stensen's duct, Steno's duct. (05 Mar 2000) |
| ductus perilymphaticus | A fine canal connecting the perilymphatic space of the cochlea with the subarachnoid space. Synonym: ductus perilymphaticus, aqueductus cochleae, cochlear aqueduct. (05 Mar 2000) |
| ductus pharyngobranchialis III | A narrow communication between the third branchial pouch and the pharynx in the embryo. (05 Mar 2000) |
| ductus pharyngobranchialis IV | A narrow communication between the fourth branchial pouch and the pharynx in the embryo. (05 Mar 2000) |
| ductus prostatici | About 20 minute canals that receive the prostatic secretion from the glandular tubules and discharge it through openings on either side of the urethral crest in the posterior wall of the urethra. Synonym: ductuli prostatici, ductus prostatici, prostatic ducts. (05 Mar 2000) |
| ductus reuniens | A short membranous tube passing from the lower end of the saccule to the cochlear duct of the membranous labyrinth. Synonym: ductus reuniens, canaliculus reuniens, canalis reuniens, Hensen's canal, Hensen's duct, uniting canal. (05 Mar 2000) |
| ductus saemicirculares | Three small membranous tubes in the bony saemicircular canals that lie within the bony labyrinth and form loops of about two-thirds of a circle. The three (anterior saemicircular duct, lateral saemicircular duct, and posterior saemicircular duct) lie in planes at right angles to each other and open into the vestibule by five openings of which one is common to the anterior and lateral ducts. Each duct has an ampulla at one end within which filaments of the vestibular nerve terminate. Synonym: ductus saemicirculares. (05 Mar 2000) |
| ductus sublinguales minores | From 8 to 20 small ducts of the sublingual salivary gland that open into the mouth on the surface of the sublingual fold; a few join the submandibular ducts. Synonym: ductus sublinguales minores, Rivinus' ducts, Walther's canals, Walther's ducts. (05 Mar 2000) |
| ductus sublingualis major | The duct that drains the anterior portion of the sublingual gland; it opens at the sublingual papilla. Synonym: ductus sublingualis major, Bartholin's duct. (05 Mar 2000) |
| ductus submandibularis | The duct of the submandibular salivary gland; it opens at the sublingual papilla near the frenulum of the tongue. Synonym: ductus submandibularis, ductus submaxillaris, submaxillary duct, Wharton's duct. (05 Mar 2000) |