lacrimal gland(redirected from pars orbitalis glandulae lacrimalis)
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the gland that secretes tears into the conjunctival sac; it consists of 6-12 separate compound tubuloalveolar serous glands, located in the upper lateral part of the orbit. It is partially divided into a smaller palpebral part (pars palpebralis) and a larger orbital part (pars orbitalis) by the aponeurosis of the levator palpebrae muscle.
Synonym(s): glandula lacrimalis [TA]
one of a pair of glands situated superiorly and laterally to the eye bulb in the lacrimal fossa of the frontal bone. It is an oval structure about the size of an almond. The gland has about 10 ducts that run obliquely beneath the conjunctiva and open along the upper and lateral half of the superior conjunctival fornix. The watery secretion from the gland consists of the tears, slightly alkaline and saline, that moisten the conjunctiva.
lac·ri·mal gland(lak'ri-măl gland) [TA]
The gland that secretes tears; it consists of 6-12 separate compound tubuloalveolar serous glands, located in the upper lateral part of the orbit, and is partially divided into a smaller palpebral part and a larger orbital part by the aponeurosis of the levator palpebrae muscle.
lacrimal glandThe tear-secreting gland lying in the upper and outer corner of the bony eye socket (orbit) and opening by many small ducts into the upper cul-de-sac of the CONJUNCTIVA behind the upper lid. Lacrimal glands secrete during emotional weeping and when the eye is irritated. The eye is normally kept wet by tiny accessory lacrimal glands in the conjunctiva.
An almond-shaped gland that secretes tears.
Mentioned in: Lacrimal Duct Obstruction
pertaining to tears.
a group of organs concerned with the production and drainage of tears; it is a nutritive and protective device that helps keep the eye moist and free of dust and other irritating particles. Includes lacrimal gland, accessory lacrimal glands, third eyelid glands and the nasolacrimal duct.
the lacrimal duct within the eyelid.
the rounded, often pigmented swelling at the medial canthus of the eye.
congenital displacement of lacrimal tissue results in subconjunctival cysts.
lacrimal drainage system
the structures concerned with tear collection; includes lacrimal lake, puncta, canaliculi, sac and nasolacrimal duct.
there are two of these minute ducts draining tears from the conjunctiva, via the lacrimal puncta, into the lacrimal sac. Called also lacrimal canaliculus.
lacrimal duct irrigator
a 20 gauge, blunt-pointed, straight or curved cannula with a needle attachment so that it can be attached directly to a syringe nozzle.
fossa in the medial wall of the orbital rim which houses the lacrimal sac.
contained in a pad of fat in the dorsolateral part of the orbital cavity and drains into the conjunctival sac via many excretory ducts. The secretion is largely watery tears, but in the pig is mucus. May develop adenitis.
lacrimal gland anomalies
failure of patency of the duct, supernumerary opening of the duct and ductal ectasia recorded.
lacrimal gland atrophy
part of the syndrome of keratoconjunctivitis sicca.
imperforate lacrimal puncta
see imperforate punctum.
the recess between the lids at the nasal commissure of the eye where the tears collect.
contraction of the orbiculari oculi muscle creates pressure on the lacrimal sac which causes tears to drain from the lacrimal lake.
there is one on each eyelid close to the medial canthus. Each drains tears from the conjunctival sac into the lacrimal duct in the same eyelid. The tears then pass to the lacrimal sac and into the nasolacrimal duct. See also punctum.
tear production caused by irritation of the cornea and conjunctiva.
the distended proximal end of the nasolacrimal duct into which the lacrimal ducts empty.
an excavation of the lacrimal bone which communicates with the maxillary sinus in some species.
see lacrimal apparatus (above).