CANAL

didymis, a long, convoluted tube of which the epididymis is made up; it is continuous with the vas deferens. eustachian c., a pa age in the petrous bone which lodges the outer part of the eustachian tube. facial c., the aqueduct of Fallopius. fallopian c., the aqueduct of Fallopius. femoral c., the inner compartment of the sheath of the femoral ve els, situated behind Poupart’s ligament and Hunter’s canal. Ferrein’s c., a canal said to be formed by the edges of the closed eyelids, and to conduct the tears during sleep to the puncta lactrimalia. Fontana’s c., the ring made up of Fontana’s spaces at the junction of the cornea, iris, and sclera: the ciliary canal. galactophorous c., a lactiferous tubule of the mammary gland. ganglionic c., extends spirally up the modiolus, and contains the spiral ganglion and nerves going to the organ of Corti. Gartner’s c., in female, a tube that is the homologue of the vas deferens: a relic of the embryonic wolffian duct. genital c., any canal for the pa age of ova or for copulatory service. gubernacular c's, four small openings in young crania, one behind each incisor tooth. c. of Guidi, the vidian canal. Hannover’s c., an artificial canal between the anterior and posterior fibers of the zonula of the lens, caused by the injection of some fibrous material. havers i an c’s, the freely anastomosing canals of the compact o eous ti ue: they contain blood-ve els, lymph-ve els, nerves, and marrow. hemal c., the space within the hemal arch. Henle’s c’s, the looped uriniferous tubules. c. of Hensen. Same as camalis reuniens. hepatic c. 1. The excretory duct of the liver; also, any one of its radicles. 2. Any one of the canals in the liver for the veins of that organ. hernial c., the pa age which transmits a hernia. His’ c., the thyroglo al duct. c. of Hovius, the canal of Fontana. Huguier’s c., the iter chorde anterius: a canal in the temporal bone which transmits the chorda tympani nerve. Hunter’s c., the triangular space between the adductor long us, adductor magnus, and vast us extern us muscles: it contains the femoral ve els and the internal saphenous nerve. Called also canal is adductor i us (B.N.A.). Huschke’s c., a pa age formed by the union of the tubercles of the tympanic ring: it commonly disappears during the years of childhood. hyaloid c., the central canal of the vitreous. incisive c., a pa age in the upper maxilla from the incisor foramina to the nasal fo a. incisor c., the anterior palatine canal. inferior dental c., one pa ing from the inferior dental foramen through the ramus, and proceeding through the body of the lower jaw bone. infra-orbital c., a pa age continuous with the infra-orbital groove on the orbital surface of the superior maxillary bone for the infra-orbital nerves and ve els. inguinal c., the pa age for the spermatic cord (round ligament in the female) from the internal to the external abdominal ring. intestinal c., the intestine; that part of the alimentary canal which lies between the pylorus and the anus. intra lobular biliary c. See biliary intrelobular c. Jacob son’s c., one that opens upon the lower surface of the petrosa and contains Jacob son's nerve: called also tympanic c. juicee’s, the minute lymph-spaces which form the origin of the lymph-ve els. Kovalevsky’s c., the neurenteric canal. lacrimalc. 1. The bony canal in which the nasal duct is lodged. 2. Any lacrimal canaliculus. Loewenberg’s c., the part of the cochlear canal above the membrane of Corti. malar c., a channel in the malar bone for the tempo rom alar branch of the superior maxillary nerve. mandibular c. Same as in- Serior dental c. voaxillary c., the dental canal. median c. 1. The central canal of the spinal cord. 2. The aqueduct of Sylvius. medu. c., the hollow, marrow-containing cavity of a long bone. membranous c., a canal in the cochlea which follows the turns of the lamina spiral is. membranous semicircular c’s, the three membranous canals (external, superior, and posterior) contained within the three bony semicircular canals of the labyrinth. ¢. of the modiolus, the spiral canal of the cochlea. nasal ς. An occasional pa age for the nasal nerve, or branches of it, in the nasal bone. 2. The laccanal. nasolacrimal c. +, the lacrimal canal. nasopalatine c., a pa age in the vomer for the nasopalatine nerve. nervous c., the medullary or cerebrospinal canal. neural c., an end-to-end pa age in the epiblastic ti ue of tthe embryo, developing into the cavity of the ven ricles and central canal of the cord. neuren-- teric c. of Kovalevsky, in the embryo, a pa age from the posterior part of the medullary tube into the archenteron. notochordal c., the neurenteric canal. c. of Nuck, a tubule of peritoneum in the young female, descending from the uterus into the inguinal canal: sometimes persistent. nutritive c. Same as haters i an c. obstetric c. Same as parturientc. obturator c., a canal in the ilium which transmits the obturator nerve and blood-ve els. olfactory c., the nasal fo e at an early stage of their embryonic development. omphalomesenteric c., a pa age which connects the cavity of the intestine of the embryo with the umbilical vesicle. parturient c., the space from the fundus uteri to the vulvar outlet. pelvic c., a pa age from the superior to the inferior strait of the pelvis. per i vascular c., any lymph-space about a blood ve el. Petit’s c., the space which in circles the periphery of the lens. petromastoid c., an canal containing a vein, in the line of union between the petrous and mastoid bones. petrosal c’s, two pa ages for the large and small superficial petrosal nerves on the upper side of the petrous bone. pharyngeal c. Same as pterygopalutine ε. plasmatic c., a havers i an canal. re c., porous c., an opening in the ovum conjectured to serve for the entrance of spermatozoids. portal ο., a space within the capsule of Gli on and liver substance containing the portal veins, branches of the hepatic ve els, and the hepatic duct. posterior alveolar c., one situated in the superior maxillary bone for the anterior superior dental nerve. posterior dental c’s, two or more canals in the upper maxillary bone for the superior posterior blood-ve els and nerves. posterior ethmoid c., one in the frontal and ethmoid bones for the posterior ethmoid ve els. posterior palatine c., the pa age for the descending palatine artery in the superior maxillary and palate bones. primitive c., the neural canal of the embryo. pseudo stomatous c., any apparent pa age in an endothelial layer terminating in a pseudos tom a. pterygoid c., the vidian canal. p go palatine c., a pa age in the sphenoid and palatine bones for ‘the terygopalatine ve els and pharyngeal nerve. p -aortic c. See duct us arteriosus. pulp-c., that part of the pulp-cavity which traverses the root of a tooth. c’s of hausen. 1. Small lymph channels in the connective ti ue which are regarded as ultimate branches of the lymphatic ine els. 2. The canals of the cornea. c. of Re the membranous canal of the cochlea. c’s not Rivinus, the excretory ducts of the sublingual glands. root-c., the canal in the center of the root of a tooth containing dental pulp. Rosenthal’s c., the spiral canal of the modiolus. ruffed 6. Same as Pelit’s c. sacculocochlear c., one that connects the sacculus and the cochlea. sacculo-utricular c., one connecting the sacculus and the utricle. c., one that runs from end to end of sacrum and transmits the sacral nerves. Sant or in i’s ¢., the duct of the le er pancreas. Saviotti’s c’s, artificially formed slits between the glandular cells of the injected pancreas. lemm’s c., the circular canal at the junction of the sclera and cornea. semi- 181