| spatia intervaginalia nervi optici | <anatomy, nerve> The spaces within the internal sheath of the optic nerve, between the arachnoidal and pial layers, filled with cerebrospinal fluid and continuous with the subarachnoid space. Synonym: spatia intervaginalia nervi optici, intersheath spaces of optic nerve, Schwalbe's spaces. (05 Mar 2000) |
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| stratum ganglionare nervi optici | <anatomy, nerve> The inner layer of multipolar neurons in the retina consisting of the relatively large neurons that give rise to the fibres of the optic nerve. Synonym: stratum ganglionare nervi optici. (05 Mar 2000) |
| discus nervi optici | The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve. Because the retina at the optic disk has no photoreceptors there is a corresponding blind spot in the visual field. (12 Dec 1998) |
| acoustic papilla | A prominent ridge of highly specialised epithelium in the floor of the cochlear duct overlying the basilar membrane of cochlea, containing one inner row and three outer rows of hair cells, or cells of Corti (the auditory receptor cells innervated by the cochlear nerve) supported by various columnar cells: the pillars of Corti, cells of Hensen, and cells of Claudius; the spiral organ is partly overhung by an awning-like shelf, the tectorial membrane, the free marginal zone of which is covered by a gelatinous substance in which the stereocilia of the outer hair cells are embedded. Synonym: organum spirale, acoustic papilla, Corti's organ. (05 Mar 2000) |
| Bergmeister's papilla | A small mass of glial tissue that forms during foetal life a temporary conical investment of the hyaloid artery at its emergence into the vitreous chamber; vestiges of it may persist as a prepapillary membrane. (05 Mar 2000) |
| bile papilla | Point of opening of the common bile duct and pancreatic duct into the duodenum; it is located posteriorly in the descending part of the duodenum. Synonym: papilla duodeni major, bile papilla, papilla of Vater, Santorini's major caruncle. (05 Mar 2000) |
| vallate papilla | One of eight or ten projections from the dorsum of the tongue forming a row anterior to and parallel with the sulcus terminalis; each papilla is surrounded by a circular trench (fossa) having a slightly raised outer wall (vallum); on the sides of the vallate papilla and the opposed margin of the vallum are numerous taste buds. Synonym: papilla vallata, circumvallate papilla. Vascular papillae, dermal papillae containing vascular loops. (05 Mar 2000) |
| palatine papilla | A slight elevation of the mucosa at the anterior extremity of the raphe of the palate. Synonym: papilla incisiva, palatine papilla. Interdental papilla, the gingiva that fills the interproximal space between two adjacent teeth. Synonym: gingival septum, interproximal papilla. (05 Mar 2000) |
| major duodenal papilla | Point of opening of the common bile duct and pancreatic duct into the duodenum; it is located posteriorly in the descending part of the duodenum. Synonym: papilla duodeni major, bile papilla, papilla of Vater, Santorini's major caruncle. (05 Mar 2000) |
| papilla | 1. <anatomy> A projection occurring in various animal tissues and organs. 2. <botany> A small blunt hair on plants. (18 Nov 1997) |
| papilla dentis | Mesodermal tissue enclosed in the invaginated portion of the epithelial enamel organ and giving rise to the dentin and pulp. (12 Dec 1998) |
| papilla duodeni major | Point of opening of the common bile duct and pancreatic duct into the duodenum; it is located posteriorly in the descending part of the duodenum. Synonym: papilla duodeni major, bile papilla, papilla of Vater, Santorini's major caruncle. (05 Mar 2000) |
| papilla duodeni minor | The site of the opening of the accessory pancreatic duct into the duodenum, located anterior to and slightly superior to the major papilla. Synonym: papilla duodeni minor, Santorini's minor caruncle. Nerve papilla, one of the papillae in the dermis containing a tactile corpuscle or other form of end organ. Synonym: neurothele. (05 Mar 2000) |
| papilla incisiva | A slight elevation of the mucosa at the anterior extremity of the raphe of the palate. Synonym: papilla incisiva, palatine papilla. Interdental papilla, the gingiva that fills the interproximal space between two adjacent teeth. Synonym: gingival septum, interproximal papilla. (05 Mar 2000) |
| papilla lacrimalis | A slight projection from the margin of each eyelid near the medial commisure, in the centre of which is the lacrimal punctum (opening of the lacrimal duct). Synonym: papilla lacrimalis. (05 Mar 2000) |