CANAL

n. Ka'n-a2!'. Gr., <r<a\rjv. Lat., canal is. Fr., c., conduit. Ger., C., Gang, Schlauch. It., canale. Sp., c. A channel, tube, or duct; a long, narrow pa age. In veterinary language, see Lingual c. [A, 325; L.] Cf. FORAMEN. Abdominal e. See Inguinal c. Abital c. See Aphodal c. Abzugsc' (Ger.). See under ABZUG. Acce ory posterior palatine c's. One or two small c's often found in the horizontal plate of the palate bone near the groove entering into the formation of the posterior palatine c. [A, 478.] Adital c. See Prosodal c. Aerial c. See Air-c. Afferent c. See Incurrent c. Air-c. Lat., canal is aeriferns. Fr., c. aerifere. An intercommunicating cavity such as exists in most vegetable organs, containing air; formed by a lacuna between the cells (an intercellular c. ) or by an arrest of development or a destruction of some of the anatomical elements. [B, 121.] Cf. Air CELLS. Alimentary c. Lat., canal is a limen tar i us. Fr., canal aliment a ire. Ger., Verdanungscanal. The whole digestive tube, from the mouth to the anus. [L, 44, 142.] Alispheiioid c. In comparative anatomy, a c. in the ali sphenoid bone, opening anteriorly into the foramen rotundum, for the pa age of the external carotid artery. [L, 153.] Alveolo-dental c's. See Dental c's.- Ambulacral c's. In the Echinoderm at a, branches of the circular c. which run outward along the middle of the inner surface of the ambulacral plates. [L, 11, 121,147.] Anal c. Fr.,c. de Vanus. The c. leading from the rectum to the external opening of the anus, corresponding in length to the thickne of the pelvic floor. Anterior dental c. Fr., c. dentaire anterieure. A c. of the superior maxilla which runs down into the facial portion of the bone and conveys the anterior dental ve els and nerves. [C.] Anterior ethmoidal c., Anterior internal orbital c. Lat., canal is ethmoidal is anterior. A c. formed between the ethmoid and frontal bones, transmitting the nasal branch of the ophthalmic nerve and the anterior ethmoidal ve els. [L, 31, 142.] Anterior palatine c. See Incisor FORAMEN and APERTURA inferior canal is incisivi. Anterior semicircular c., Anterior vertical semicircular c. See Superior semicircular c. Aphodal c. In certain sponges, a c. connecting a chamber with an excurrent c. [L, 121.] Apical c's. In the Ctenophora, two c's given off from the funnel and terminating in the apical pores near the apical pole. [L, 147.J Aquiferous c's. Fr., canaux aquiferes. Simple or branched c's which, in many molluscs, traverse the substance of the foot, opening externally by pores, or, in many instances, internally into the blood-sinuses; in the Entozoa, a series of ramifying excretory c's with blind extremities, converging to a common c. that opens externally. [L, 11, 16.] Arachnoid c. Lat., canal is a rach no ide us. Fr., c. arachno'idie.n (ou de Bichat). A space formed beneath the arachnoid membrane of the brain, as it cro es the transverse and longitudinal fi ures; it lodges the venae magnae Galeni. [I, 3; K.] Arterial c. See DUCTUS arteriosus. Auditory c's. See External auditory c. and Internal auditory c. Auricular c. See External auditory c. Avant-c. (Fr.). The anterior portion of the male urethra. [L, 88.] Axenc' der Gehorschnecke (Ger.). See Central c. of the modiolus. Axenc' des Kiickenmarks (Ger.). See Central c. of the spinal cord. Axial c. In certain Echinoderm at a, the central canal of a brachium, opening into the alimentary c. [L, 121.] Bartholin's O, no; O, not; O", whole; Th, thin; Th2, the; U, like oo in too; [s. 49]