| 释义 |
lacrimal apparatus
Thesaurus| Noun | 1. | lacrimal apparatus - the structures that secrete and drain tears from the eyeanatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"eye, oculus, optic - the organ of sightlachrymal gland, lacrimal gland, tear gland - any of the glands in the eyes that secrete tearslachrymal duct, lacrimal duct, tear duct - any of several small ducts that carry tears from the lacrimal glandsdacryocyst, lacrimal sac, tear sac - either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands |
lacrimal apparatus
lacrimal apparatus[′lak·rə·məl ‚ap·ə′rad·əs] (anatomy) The functional and structural mechanisms for secreting and draining tears; includes the lacrimal gland, lake, puncta, canaliculi, sac, and nasolacrimal duct. lacrimal apparatus
apparatus [ap″ah-rat´tus] (pl. appara´tus, apparatuses) an arrangement of a number of parts acting together to perform a special function.Golgi apparatus see golgi apparatus" >golgi apparatus.juxtaglomerular apparatus a collective term for the juxtaglomerular cells in a nephron.lacrimal apparatus see lacrimal apparatus.Wangensteen's apparatus a nasal suction apparatus connected with a duodenal tube for aspirating gas and fluid from stomach and intestine.
lacrimal [lak´rĭ-mal] pertaining to tears.lacrimal apparatus a group of organs concerned with the production and drainage of tears; it is a protective device that helps keep the eye moist and free of dust and other irritating particles. The lacrimal gland, which secretes tears, lies over the upper, outer corner of the eye; its excretory ducts branch downward toward the eyeball. A constant stream of tears washes down over the front of the eye and is drained off through two small openings located in the inner corner of the eye. Through these openings the tears pass into the lacrimal canaliculus, then through the lacrimal sac into the nasolacrimal duct and finally into the nasal cavity. The lacrimal apparatus. From Jarvis, 1996.lac·ri·mal ap·pa·ra·tus [TA] the structures that, with the conjunctival sac, produce and provide drainage for lacrimal fluid (tears), consisting of the lacrimal gland, the lacrimal lake, the lacrimal canaliculi, the lacrimal sac, and the nasolacrimal duct. Synonym(s): apparatus lacrimalis [TA]lac·ri·mal ap·pa·ra·tus (lak'ri-măl ap'ă-rat'ŭs) [TA] Consisting of the lacrimal gland, the lacrimal lake, the lacrimal canaliculi, the lacrimal sac, and the nasolacrimal duct. lacrimal apparatus LACRIMAL APPARATUS: Anterior viewStructures concerned with the secretion and conduction of tears. It includes the lacrimal gland and its secretory ducts, lacrimal canaliculi, lacrimal sac, and nasolacrimal duct, which empties into the nasal cavity. See: illustrationPatency of the lacrimal duct may be tested by placing a dilute solution of sugar in the conjunctival sac; if the duct is patent, the individual will report the sensation of sweetness in the mouth; if not, the sugar will not be perceived. lacrimal apparatusThe system involved in the production and conduction of tears. It consists of the lacrimal gland and accessory lacrimal glands (glands of Krause and Wolfring); the eyelid margins; and the two puncta lacrimae. Each punctum is a small round or oval aperture situated on a slight elevation at the inner end of the upper and lower lid margin (lacrimal papilla) and forms the entrance to the canaliculi. Each canaliculus consists of a vertical portion of about
lacrimal apparatusThe system involved in the production and conduction of tears. It consists of the lacrimal gland and accessory lacrimal glands (glands of Krause and Wolfring); the eyelid margins; and the two puncta lacrimae. Each punctum is a small round or oval aperture situated on a slight elevation at the inner end of the upper and lower lid margin (lacrimal papilla) and forms the entrance to the canaliculi. Each canaliculus consists of a vertical portion of about 2 mm long and then bends inward for some 8 mm, the upper one being slightly shorter. The canaliculi pierce the lacrimal fascia (i.e. the periorbita covering the lacrimal sac or tear sac) and unite (forming the common canaliculus) to enter a small diverticulum of the sac called the sinus of Maier. The lacrimal sac is closed above and open below where it is continuous with the nasolacrimal duct which extends over some 1.5 cm in length to Hasner's valve (or Bianchi's valve or plica lacrimalis) (folds of mucous membrane) at the inferior meatus of the nose. The inferior opening of the duct is called the ostium lacrimale (Fig. L1). See dacryocystitis; epiphora; lacrimal fistula; fossa for the lacrimal sac; Sjögren's syndrome; tear duct; dye dilution test; Jones II test; valve of Krause. " > Fig. L1 Lacrimal apparatuslac·ri·mal ap·pa·ra·tus (lak'ri-măl ap'ă-rat'ŭs) [TA] Consisting of the lacrimal gland, the lacrimal lake, the lacrimal canaliculi, the lacrimal sac, and the nasolacrimal duct. lacrimal apparatus
Related to lacrimal apparatus: Lacus lacrimalisWords related to lacrimal apparatusnoun the structures that secrete and drain tears from the eyeRelated Words- anatomical structure
- bodily structure
- body structure
- complex body part
- structure
- eye
- oculus
- optic
- lachrymal gland
- lacrimal gland
- tear gland
- lachrymal duct
- lacrimal duct
- tear duct
- dacryocyst
- lacrimal sac
- tear sac
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