Infobox Anatomy Name Lacrimalpunctum Latin GraySubject 227 GrayPage 1028 Image Gray895.png Caption The tarsal glands , etc., seen from the inner surface of the eyelids . Puncta lacrimalia visible at center left. Image2 Gray896.png Caption2 The lacrimal apparatus . Right side. Note outdated terminology The Lacrimal ducts in Gray s are now called Lacrimal canals . System Precursor MeshName MeshNumber DorlandsPre p 42 DorlandsSuf 12680460 The lacrimal canaliculi , one in each eyelid , commence at minute orifices, termed puncta lacrimalia or lacrimalpunctum , or lacrimal point , on the summits of the papillae lacrimales , seen on the margins of the lids at the lateral extremity of the lacus lacrimalis . There are two lacrimal puncta in the medial inside portion of each eye. Together, they function to collect tears produced by the lacrimal gland s. The fluid is conveyed to the lacrimal sac , and thence via the nasolacrimal duct to the inner nose. Additional images gallery Image Lacrimal punctum.jpg A close up of a lacrimalpunctum. gallery See also Imperforate lacrimalpunctumLacrimal apparatus Punctal plug External links http www.aafp.org afp 980600ap carter.html Diagram and discussion at aafp.org Gray s Accessory organs of the eye Category Eye anatomy eye stub es Punto lagrimal ... more details
An imperforate lacrimalpunctum is a congenital disorder of dog s involving the lack of an opening to the nasolacrimal duct tear duct in the conjunctiva . Dogs normally have two Puncta lacrimalia lacrimal puncta , the superior and inferior. This condition can affect either or both. Symptoms include excessive tears tearing and tear staining of the hair around the eye. Affected breeds include the American Cocker Spaniel , Bedlington Terrier , Golden Retriever , Poodle , and Samoyed dog Samoyed . ref name Gelatt 1999 cite book author Gelatt, Kirk N. ed. title Veterinary Ophthalmology edition 3rd ed. publisher Lippincott, Williams & Wilkins year 1999 isbn 978 0 683 30076 5 ref Imperforate lacrimal puncta can be corrected by surgical opening of the punctum. References references Category Dog diseases eye stub Veterinary med stub ... more details
The term Lacrimal alternative spelling Lachrymal can refer to In typography A type of Stroke ending typography In anatomy Lacrimal apparatus Lacrimal artery Lacrimal bone Lacrimal canaliculi singular canaliculus , also known as Lacrimal ducts Lacrimal fossa Lacrimal fluid, see Tears Lacrimal gland Lacrimal groove , also known as Lacrimal sulcus Lacrimal hamulus Lacrimal lake Lacrimal nerve Lacrimal papilla LacrimalpunctumLacrimal sac Lacrimal secretion, see Tears Lacrimal tubercle Nasolacrimal duct disambig ... more details
Italic title Taxobox name Cinguloterebra punctum image image caption regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Caenogastropoda br clade Hypsogastropoda br clade Neogastropoda superfamilia Conoidea familia Terebridae subfamilia genus Cinguloterebra species C. punctum binomial Cinguloterebra punctum binomial authority Poppe, Tagaro & Terryn, 2009 synonyms ref synonyms Cinguloterebra punctum is a species of sea snail , a marine gastropod mollusk in the family biology family Terebridae , the auger snails. ref name WoRMS WRMS species 438629 Cinguloterebra punctum Poppe, Tagaro & Terryn, 2009 7 April 2010 ref Description Empty section date April 2010 Distribution Empty section date April 2010 References reflist External links Use dmy dates date January 2011 DEFAULTSORT Cinguloterebra Punctum Category Terebridae terebridae stub pt Cinguloterebra punctum vi Cinguloterebra punctum ... more details
italictitle Taxobox name Punctum image Punctum minutissimum.png image caption Punctum minutissimum image2 Punctum pygmaeum shell.jpg image2 caption Apical view of a gastropod shell shell of Punctum pygmaeum regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Heterobranchia clade Euthyneura br clade Panpulmonata br clade Eupulmonata br clade Stylommatophora br informal group Sigmurethra superfamilia Punctoidea familia Punctidae subfamilia genus Punctum genus authority Edward S. Morse Morse , 1864 ref Morse E. S. 1864. Observations on the terrestrial Pulmonifera, including a catalogue of all species of terrestrial and fluviatile Mollusca known to inhabit the state . Journal of the Portland Society of Natural History 1 1 1 63, Pl. I II 1 2 , 3 10. ref synonyms Punctum is a genus of very small air breathing land snail s, terrestrial animal terrestrial pulmonate gastropod mollusk s or micromollusk s in the family Punctidae , the dot snails. Species The genus Punctum includes the following species The type species is Helix minutissima Lea, 1841. Punctum azoricum De Winter, 1988 ref name AB list http www.animalbase.uni goettingen.de zooweb servlet AnimalBase list species?taxongenus 317 Species in genus Punctum n 2 . AnimalBase, accessed 5 July 2011. ref Punctum blandianum Pilsbry, 1900 Punctum californicum Pilsbry, 1898 Punctum minutissimum I. Lea, 1841 but Helix minutissima may be considered as a synonym of Punctum pygmaeum ref http www.animalbase.uni goettingen.de zooweb servlet AnimalBase list speciessynonyms?taxon id 13906 Synonyms of Helix pygmaea . accessed 5 July 2011. ref Punctum pallidum Connolly, 1922 ref name Wronski 2010 Wronski T. & Hausdorf ... Studies 76 1 87 100. doi 10.1093 mollus eyp048 . ref Punctum pygmaeum Jacques Philippe Raymond ... ref name AB list type species Punctum randolphi Dall, 1895 Punctum ugandanum E. A. Smith, 1903 ref ... 890 AnimalBase info DEFAULTSORT Punctum Category Punctidae Punctidae stub ... more details
Taxobox image Punctum pygmaeum shell.jpg image caption An apical view of a gastropod shell shell of Punctum pygmaeum image2 Punctum pygmaeum shell 2.jpg image2 caption A basal view of a shell of Punctum pygmaeum regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Heterobranchia br clade Euthyneura br clade Panpulmonata br clade Eupulmonata br clade Stylommatophora superfamilia Punctoidea familia Punctidae subfamilia genus Punctum genus Punctum species P. pygmaeum binomial Punctum pygmaeum binomial authority Jacques Philippe Raymond Draparnaud Draparnaud , 1801 ref Draparnaud J. P. R. 1801. Tableau des mollusques terrestres et fluviatiles de la France . pp. 1 2 , 1 116. Montpellier, Paris. Renaud Bossange, Masson & Besson . ref synonyms Helix pygm a small Draparnaud, 1801 br Punctum pygmaeum is a species of very small air breathing land snail , a terrestrial animal terrestrial pulmonate gastropod mollusk in the family Punctidae . File Slug eggs.jpg thumb none Eggs of Limacus flavus and around them are even smaller Punctum pygmaeum Shell description The gastropod shell shell is very small, 1.2 1.6 mm in width. ref http www.animalbase.uni goettingen.de zooweb servlet AnimalBase home species?id 1856 ref Distribution This species occurs in countries and islands which include List of non marine molluscs of the Czech Republic Czech Republic List of non marine molluscs of Great Britain Great Britain List of non marine molluscs of Ireland Ireland List of non marine molluscs of Slovakia Slovakia List of non marine molluscs of Poland Poland List of non marine molluscs of the Netherlands Netherlands List of non marine molluscs of Latvia Latvia List of non marine molluscs of Bulgaria Bulgaria and other areas References reflist commons category Punctum pygmaeum DEFAULTSORT Punctum Pygmaeum Category Punctidae Punctidae stub ... more details
italic title Taxobox name Phylloxiphia punctum image image width 250px image caption regnum Animal ia phylum Arthropod a classis Insect a ordo Lepidoptera familia Sphingidae genus Phylloxiphia species P. punctum binomial Phylloxiphia punctum binomial authority Rothschild, 1907 ref cite web url https www.cate sphingidae.org taxonomy Phylloxiphia punctum.html title CATE Creating a Taxonomic eScience Sphingidae publisher Cate sphingidae.org date accessdate 2011 11 01 ref synonyms Libyoclanis punctum small Rothschild, 1907 small Phylloxiphia punctum is a moth of the Sphingidae family. It is known from savanna from north eastern South Africa to Zimbabwe , Zambia , the Democratic Republic of the Congo and Tanzania . ref cite web url http www.biodiversitylibrary.org jeanhs XXVI 20No.3 20 115 1 1967 Carcasson.pdf title Revised Catalogue of the African Sphingidae Lepidoptera with Descriptions of the East African species publisher Biodiversitylibrary.org date accessdate 2011 11 01 ref The length of the forewings is about 35 mm. Females are somewhat larger and have more rounded wings. The head and thorax are bright pinkish brown, but the is abdomen paler. The forewings are long and narrow, pinkish brown with a blackish dot near the apex and a reddish inner marginal basal streak. The hindwings are pinkish orange. References reflist Category Phylloxiphia Smerinthini stub nl Phylloxiphia punctum vi Phylloxiphia punctum ... more details
italictitle Taxobox name Punctum minutissimum image Punctum minutissimum.png image caption Punctum minutissimum image2 Punctum minutissimum video1.ogg image2 caption video of Punctum minutissimum regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Heterobranchia br clade Euthyneura br clade Panpulmonata br clade Eupulmonata br clade Stylommatophora superfamilia Punctoidea familia Punctidae genus Punctum gastropod Punctum species P. minutissimum binomial Punctum minutissimum binomial authority Isaac Lea I. Lea , 1841 Punctum minutissimum is a species of minute air breathing land snail , a terrestrial animal terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails. Shell description The shell of Punctum minutissimum is slightly translucent and pale brown in color. It is 1.1 to 1.3 mm wide, and has 3.5 to 4.5 whorls. The outer shell surface has a sculpture mollusc sculpture of radial striae, which are obvious under magnification. The underside of the shell has a very wide umbilicus mollusc umbilicus , almost 25 of the shell s width. ref John B. Burch Burch J. B. 1962 . How to Know the Eastern Land Snails . WM. C Brown Co., Dubuque, IA. ref File Minutissimum top.jpg left thumb apical view File Minutissimum front 1.jpg left thumb apertural view. File Minutissimum bottom1.JPG left thumb umbilical view Distribution This species occurs in North America , from Maine to Florida , and west to Oregon and New Mexico . ref Burch J. B. & Jung Y. 1988 . Land Snails of the University of Michigan Biological Station Area . Society for Experimental and Descriptive Malacology, Walkerana 9 . ref Habitat This small snail lives in damp leaf litter and decaying fallen beech logs. It is often found around polypore and bolete fungi. ref Henry ... links commons category Punctum minutissimum http www.carnegiemnh.org mollusks palandsnails pu minu.html DEFAULTSORT Punctum Minutissimum Category Punctidae ... more details
italictitle Taxobox name Punctum blandianum image blandianum.jpg image caption Dorsal, ventral and apertural views of a Gastropod shell shell of Punctum blandianum . regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Heterobranchia br clade Euthyneura br clade Panpulmonata br clade Eupulmonata br clade Stylommatophora superfamilia Punctoidea familia Punctidae genus Punctum genus Punctum species P. blandianum binomial Punctum blandianum binomial authority Henry Augustus Pilsbry Pilsbry , 1900 Punctum blandianum is a species of minute air breathing land snail , a terrestrial animal terrestrial pulmonate gastropod mollusk in the family Punctidae , the dot snails. Shell description The shell of P. blandianum is between 1.1 and 1.3 mm wide. The outer shell surface has a sculpture mollusc sculpture of radial striae, which are obvious under magnification. The umbilicus mollusc umbilicus is about one third the width of the shell. ref Pilsbry H.A. 1948. Land Mollusca of North America North of Mexico . The Academy of Natural Sciences of Philadelphia, Monographs, 3, vol. 2 part 2 521 1113. ref Distribution This species is found in the USA , in the states of Tennessee , Virginia and Alabama . ref Burch, J.B. How to Know the Eastern Land Snails. WM. C Brown Co., Dubuque, IA 1962 ref Habitat Population sizes of Punctum blandianum have been observed to be five times larger on highly acidic sites than on basic sites. ref Nekola, J. C. 2010. Acidophilic Terrestrial Gastropod Communities of North America , Journal of Molluscan Studies Advance Access DOI 10.1093 mollus eyp053 ref References reflist commonscat Punctum blandianum DEFAULTSORT Punctum Blandianum Category Punctidae Punctidae stub ... more details
orphan date May 2010 italictitle Taxobox name Punctum randolphi regnum Animal ia image Randolphi1.jpg image caption Dorsal, ventral, and apertural views of a gastropod shell shell of Punctum randolphi , Carnegie Museum of Natural History CM 85566, small Scale bar is 1 mm. small phylum Mollusca classis Gastropoda unranked superfamilia clade Heterobranchia br clade Euthyneura br clade Panpulmonata br clade Eupulmonata br clade Stylommatophora superfamilia Punctoidea familia Punctidae genus Punctum genus Punctum species P. randolphi binomial Punctum randolphi binomial authority William Healy Dall Dall , 1895 Punctum randolphi is a species of minute air breathing land snail , a terrestrial animal terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails. Shell description The diameter of the shell of Punctum randolphi is between 1.25 and 1.4 mm wide. The exterior surface has a very faint sculpture mollusc sculpture of radial striae. The aperture of Punctum randolphi is wide and somewhat oblique. The umbilicus is small and deep. ref Pilsbry H.A. 1948. Land Mollusca of North America North of Mexico . The Academy of Natural Sciences of Philadelphia, Monographs, 3, vol. 2 part 2 521 1113. ref Distribution Punctum randolphi is found in North America , in British Columbia , Washington U.S. state Washington , Oregon , and Idaho . References reflist Category Punctidae Punctidae stub ... more details
Speciesbox taxon Allium punctum authority L.F.Hend. synonyms Allium miser Allium punctum is a species of Allium wild onion known by the common name dotted onion . It is native to the western United States in and around the Modoc Plateau , where it is an uncommon member of the flora on the volcanic flats. This onion grows from a yellow brown to grayish oval shaped bulb one or two centimeters wide. It produces a short stem no more than 10 centimeters tall and two sickle shaped leaves which are usually a bit longer. The inflorescence bears up to 20 flowers which are white or pink with purple veining. External links http ucjeps.berkeley.edu cgi bin get JM treatment.pl?8349,8354,8410 Jepson Manual Treatment http plants.usda.gov java profile?symbol ALPU USDA Plants Profile http www.efloras.org florataxon.aspx?flora id 1&taxon id 242101393 Flora of North America Allium DEFAULTSORT Allium Punctum Category Allium punctum Category Onions Asparagales stub az Allium punctum ... more details
Infobox Anatomy Name Lacrimal papilla Latin papilla lacrimalis GraySubject 227 GrayPage 1025 Image Gray892.png Caption Front of left eye with eyelids separated to show medial canthus . Lacrimal papilla not labeled, but region visible. Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre p 03 DorlandsSuf 12610452 At the basal angles of the lacus lacrimalis , on the margin of each eyelid , is a small conical elevation, the lacrimal papilla , the apex of which is pierced by a small orifice, the punctum lacrimale , the commencement of the lacrimal duct . See also Papilla disambiguation External links http anatomy.uams.edu AnatomyHTML viscera head&neck.html Description at uams.edu eMedicineDictionary lacrimal papilla Gray s Accessory organs of the eye Category Eye anatomy eye stub es Papila lagrimal ... more details
Infobox Anatomy Name Lacrimal lake Latin lacus lacrimalis GraySubject 227 GrayPage 1025 Image Gray892.png Caption Front of left human eye eye with eyelids separated to show medial canthus . Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre l 01 DorlandsSuf 12475299 The lacrimal lake is the pool of tears in the lower conjunctiva l cul de sac, which drains into the opening of the tear drainage system the puncta lacrimalia . ref name Cassin Cassin, B. and Solomon, S. Dictionary of Eye Terminology . Gainsville, Florida Triad Publishing Company, 1990. ref The volume of the lacrimal lake has been estimated to be between 7 and 10 microlitre L . ref http www.collectionscanada.ca obj s4 f2 dsk1 tape4 PQDD 0015 MQ54172.pdf www.collectionscanada.ca ref Although the lacrimal lake usually contains 7 10 L of tears, the maximum fluid it can usually hold is 25 30 L before tearing occurs. Aging usually causes the eyelids to become more loose which in turn enables the lacrimal lake to hold even more fluid. The lacrimal papilla is an elevation located on the medial canthus where the punctum is found. See also Dry eye syndrome Lacrimal apparatus Medial palpebral commissure References references Accessory organs of the eye Category Eye anatomy eye stub es Lago lagrimal ... more details
to the lacrimalpunctumlacrimal puncta , small holes found at the inner corner of the eyelids. These pass the tears on to the lacrimal sac , in turn to the nasolacrimal duct , which dumps them out into the nose ...Infobox Anatomy Name Lacrimal gland Latin glandula lacrimalis GraySubject 227 GrayPage 1028 Image Gray896.png Caption Lacrimal apparatus of the right eye. The lacrimal gland is to the upper left. The right side of the picture is towards the nose. Image2 Tear system.svg Caption2 Tear system. BR BR a lacrimal gland BR b superior lacrimalpunctum BR c superior Lacrimal canaliculi lacrimal canal BR d lacrimal sac BR e inferior lacrimalpunctum BR f inferior Lacrimal canaliculi lacrimal canal BR g nasolacrimal canal Precursor System Artery lacrimal artery Vein Nerve lacrimal nerve , Zygomatic nerve ... 12392431 The lacrimal glands are paired almond shaped gland s, one for each human eye eye , that secrete ... Orbit anatomy orbit , in the lacrimal fossa of the orbit formed by the frontal bone. ref name ... & Agur. ref Inflammation of the lacrimal glands is called dacryoadenitis. The lacriminal gland ... Suite DVD 2010 ref Microanatomy The lacrimal gland is a compound tubuloacinar gland , it is made ... like mass of lacrimal gland cells with their apices pointed to a central lumen anatomy lumen . The central ... originates from the lacrimal nucleus of the facial nerve in the pons . Just distal to the geniculate ... with the lacrimal branch of the ophthalmic division of CN V, which supplies sensory innervation to the lacrimal gland along with the eyelid and conjunctiva. The sympathetic nervous system sympathetic .... However, they continue to course with the parasympathetic fibers innervating the lacrimal gland. Blood supply The lacrimal artery , derived from the ophthalmic artery supplies the lacrimal gland. Venous blood returns via the superior ophthalmic vein . Applied Anatomy The upper part of the lacrimal ... of the sac and it should be take care during incising the sac. Between the lacrimal sac and the fascia ... more details
Infobox Anatomy Name PAGENAME Latin hamulus lacrimalis GraySubject 39 GrayPage 164 Image Caption Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre h 02 DorlandsSuf 12407626 The posterior lacrimal crest, with a part of the orbital surface immediately behind it, gives origin to the lacrimal part of the Orbicularis oculi and ends below in a small, hook like projection, the lacrimal hamulus , which articulates with the lacrimal tubercle of the maxilla , and completes the upper orifice of the lacrimal canal it sometimes exists as a separate piece, and is then called the lesser lacrimal bone. See also hamulus Gray s anatomy stub Facial bones Category Bones of the head and neck ... more details
Infobox Anatomy Name Lacrimal canaliculi Latin canaliculus lacrimalis GraySubject 227 GrayPage 1028 Image Gray896.png Caption The lacrimal apparatus . Right side. Image2 Caption2 System MeshName MeshNumber DorlandsPre c 04 DorlandsSuf 12208445 The lacrimal canaliculi , also known as the lacrimal canals or lacrimal ducts , are the small channels in each eyelid that commence at minute orifices, termed puncta lacrimalia , on the summits of the papillae lacrimales , seen on the margins of the lids at the lateral extremity of the lacus lacrimalis . The superior duct , the smaller and shorter of the two, at first ascends, and then bends at an acute angle, and passes medialward and downward to the lacrimal sac . The inferior duct at first descends, and then runs almost horizontally to the lacrimal sac . At the angles they are dilated into ampull . Able to be seen under microscope, they are lined by nonkeratinizing stratified squamous epithelium surrounded by fibrous tissue. Outside the latter is a layer of striped muscle, continuous with the lacrimal part of the Orbicularis oculi at the base of each lacrimal papilla, the muscular fibers are circularly arranged and form a kind of sphincter . Clinical significance Canaliculitis is an inflammation of the canaliculus. ref http www.revoptom.com handbook oct02 sec1 2.htm Handbook of Ocular Disease Management Molluscum Contagiosum Bot generated title ref See also Lacrimal apparatus canaliculus References references External links eMedicineDictionary lacrimal canaliculus Gray s Accessory organs of the eye Category Eye anatomy eye stub es Canal culo lagrimal pl Kanalik zowy ... more details
Infobox Anatomy Name Lacrimal tubercle Latin GraySubject 38 GrayPage 161 Image Gray157.png Caption Left maxilla . Outer surface. Lacrimal tubercle labeled at center top. Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre DorlandsSuf The lateral margin of the groove of the frontal process of the maxilla is named the anterior lacrimal crest , and is continuous below with the orbital margin at its junction with the orbital surface is a small tubercle, the lacrimal tubercle , which serves as a guide to the position of the lacrimal sac . Gray s Category Head and neck musculoskeletal stub ... more details
Infobox Anatomy Name Lacrimal apparatus Latin apparatus lacrimalis GraySubject 227 GrayPage 1028 Image Gray896.png Caption The lacrimal apparatus. Right side. Image2 Caption2 System MeshName MeshNumber DorlandsPre a 54 DorlandsSuf 12147244 The lacrimal apparatus is the physiologic system containing the orbital structures for tear production and drainage. ref name Cassin Cassin, B. and Solomon, S. Dictionary of Eye Terminology . Gainsville, Florida Triad Publishing Company, 1990. ref br It consists of a the lacrimal gland , which secretes the tear s, and its excretory ducts, which convey the fluid to the surface of the human eye eye b the lacrimal canaliculi , the lacrimal sac , and the nasolacrimal duct , by which the fluid is conveyed into the cavity of the Human nose nose , emptying anterioinferiorly to the inferior nasal conchae at the nasolacrimal duct. c the nerve supply of lacrimal apparatus done by carotid plexuse of nerves along artery internal and external sympathetically but parasympathetic from lacrimal nucleus of the facial nerve References reflist External links http academia.hixie.ch bath eye AnteriorViewOfLacrimalApparatus.gif Diagram at hixie.ch Gray s Accessory organs of the eye Category Eye anatomy eye stub ar cs Slzn apar t de Tr nenapparat et Pisaras steem es Aparato lagrimal pl Narz d zowy pt Sistema lacrimal sr Suzni aparat oka ... more details
Infobox Bone Name Lacrimal groove Latin s. lacrimalis maxillae GraySubject 38 GrayPage 160 Image Gray163.png Caption Left lacrimal bone . Orbital surface. Enlarged. Lacrimal groove visible at left. Image2 Caption2 Width 173 System Precursor MeshName MeshNumber DorlandsPre s 28 DorlandsSuf 12768911 On the nasal surface of the body of the maxilla , in front of the opening of the sinus is a deep groove, the lacrimal groove or lacrimal sulcus , which is converted into the nasolacrimal canal , by the lacrimal bone and inferior nasal concha this canal opens into the inferior meatus of the nose and transmits the nasolacrimal duct . Additional images gallery Image Gray191.png Horizontal section of nasal and orbital cavities. gallery Gray s Facial bones Category Bones of the head and neck musculoskeletal stub ... more details
Infobox Anatomy Name Lacrimal sac Latin saccus lacrimalis GraySubject 227 GrayPage 1028 Image Gray896.png Caption The lacrimal apparatus . Right side. Lacrimal sac visible at upper right. Image2 Gray894.png Caption2 The tarsi and their ligaments. Right eye front view. Lacrimal sac visible at middle right. Precursor System Artery angular artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre s 01 DorlandsSuf 12717293 The lacrimal sac is the upper dilated end of the nasolacrimal duct , and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla . It connects the lacrimal canaliculi , which drain tears from the eye s surface, and the nasolacrimal duct , which conveys this fluid into the nasal cavity. This is mainly for high amounts of tears, in which the lacrimal sac pumps inward and outward driven by the orbicularis oculi orbicularis muscle during blinking. It is oval in form and measures from 12 to 15 mm. in length its upper end is closed and rounded its lower is continued into the nasolacrimal duct. Its superficial surface is covered by a fibrous expansion derived from the medial palpebral ligament , and its deep surface is crossed by the lacrimal part of the Orbicularis oculi , which is attached to the crest on the lacrimal bone. Like the nasolacrimal duct, the sac is lined by stratified columnar epithelium with mucus secreting goblet cells , with surrounding connective tissue. The Lacrimal Sac also drains the eye of any debris, bacteria, dirt, etc. anchor dacrocystography The lacrimal sac can be pictured by dacrocystography , which is injecting radiocontrast into it and performing X ray imaging of it. Additional images gallery Image Gray192.png Medial wall of left orbit. Image Gray379.png Left orbicularis oculi, seen from behind. gallery See also Lacrimal apparatus Gray s Accessory organs of the eye Category Eye anatomy eye stub es Saco lagrimal pl Woreczek zowy fi Kyynelpussi ... more details
Infobox Bone Name PAGENAME Latin os lacrimale GraySubject 39 GrayPage 164 Image Gray164.png Caption Lacrimal bone visible near center. Image2 Orbital bones.png Caption2 Orbital bones. Lacrimal bone shown in green. Articulations MeshName MeshNumber DorlandsPre DorlandsSuf The lacrimal bone , the smallest ... or orbital surface is divided by a vertical ridge, the posterior lacrimal crest , into two parts. In front of this crest is a longitudinal groove, the lacrimal sulcus sulcus lacrimalis , the inner margin of which unites with the frontal process of the maxilla , and the lacrimal fossa is thus completed. The upper part of this fossa lodges the lacrimal sac , the lower part, the nasolacrimal duct ..., with a part of the orbital surface immediately behind it, gives origin to the lacrimal part of the Orbicularis oculi and ends below in a small, hook like projection, the lacrimal hamulus , which articulates with the lacrimal tubercle of the maxilla , and completes the upper orifice of the nasolacrimal canal the hamulus sometimes exists as a separate piece, and is then called the lesser lacrimal bone .... The inferior is divided by the lower edge of the posterior lacrimal crest into two parts the posterior ... process, which articulates with the lacrimal process of the inferior nasal concha , and assists in forming the canal for the nasolacrimal duct. Ossification The lacrimal is ossified from a single ... capsule. Articulations The lacrimal articulates with four bones two of the cranium, the frontal bone .... In other animals In early lobe finned fish es and ancestral tetrapod s, the lacrimal bone is a relatively ... modern species. The lacrimal bone is often smaller in living vertebrates, and is no longer always ... images center gallery Image Gray163.png Left lacrimal bone. Orbital surface. Enlarged Image ... Lacrimal bone.jpg thumb Lacrimal bone File Lacrimal and nasal bones.jpg Lacrimal and nasal bones File Orbital cavity.jpg Lacrimal bone gallery center See also Bone Terminology Bone terminology Terms for anatomical ... more details
Infobox Nerve Name Lacrimal nerve Latin nervus lacrimalis GraySubject 200 GrayPage 887 Image Gray787.png Caption Dissection showing origins of right ocular muscles , and nerves entering by the superior orbital fissure . Image2 Gray777.png Caption2 Nerves of the orbit , and the ciliary ganglion . Side view. Innervates lacrimal gland BranchFrom ophthalmic nerve BranchTo MeshName MeshNumber DorlandsPre n 05 DorlandsSuf 12566040 The lacrimal nerve is the smallest of the three branches of the ophthalmic division of the trigeminal nerve . It sometimes receives a filament from the trochlear nerve , but this is possibly derived from the branch that goes from the ophthalmic to the trochlear nerve . It passes forward in a separate tube of dura mater , and enters the orbit through the narrowest part of the superior orbital fissure . In the orbit it runs along the upper border of the lateral rectus muscle lateral rectus , with the lacrimal artery , and communicates with the zygomatic branch of the maxillary nerve . It enters the lacrimal gland and gives off several filaments, which supply sensory innervation to the gland and the conjunctiva . Then, it pierces the orbital septum , and ends in the skin of the upper eyelid , joining with filaments of the facial nerve . The lacrimal nerve is occasionally absent, and its place is then taken by the zygomaticotemporal branch of the maxillary nerve . Sometimes the latter branch is absent, and a continuation of the lacrimal nerve is substituted for it. Functions It provides sensory innervations for the lacrimal gland , conjunctiva , and the lateral ... carries post synaptic parasympathetic fibers originating in the pterygopalatine ganglion to the lacrimal nerve via a communication. These fibers will eventually provide innervation to the lacrimal ... links SUNYAnatomyLabs 29 16 01 02 Orbits and Eye The Lacrimal Gland UMichAtlas n2a4p2 Branches of Trigeminal ... stub eye stub ja pl Nerw zowy pt Nervo lacrimal sr ... more details
Infobox Anatomy Name Lacrimal caruncle Latin caruncula lacrimalis GraySubject 227 GrayPage 1028 Image Gray892.png Caption Front of left eye with eyelids separated. Caruncula visible and labeled at left. Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber The caruncula lachrymalis is the small, pink, globe like nodule at the inner corner the medial angle of the human eye eye . It is made of skin covering Sebaceous gland sebaceous oil and Sweat gland sudoriferous sweat glands . References reflist GraySubject 227 The Accessory Organs of the Eye External links Accessory organs of the eye Category Eye anatomy eye stub de Tr nenkarunkel nl Traanheuvel ... more details
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