conjunctival sac

sac

[sak] a baglike organ or structure; see also bag, pocket, and pouch.air s's (alveolar s's) the spaces into which the alveolar ducts open distally, and with which the alveoli communicate; see also lung" >lung.amniotic sac the sac formed by the amnion, enclosing the fetus suspended in amniotic fluid; popularly known as the bag of waters.conjunctival sac the potential space, lined by conjunctiva, between the eyelids and the eyeball.endolymphatic sac the blind, flattened cerebral end of the endolymphatic duct.hernial sac the peritoneal pouch that encloses protruding intestine.lacrimal sac the dilated upper end of the nasolacrimal duct; see also lacrimal apparatus.yolk sac the extraembryonic membrane connected with the midgut; in vertebrates below true mammals, it contains a yolk mass.

Yolk sac in a developing embryo. From Applegate, 2000.

con·junc·ti·val sac

[TA] the space bound by the conjunctival membrane between the palpebral and bulbar conjunctiva, into which the lacrimal fluid is secreted; it is a closed space when eye is closed; when eye is open, the sac is open anteriorly through the palpebral fissure (between the eyelids). Synonym(s): saccus conjunctivalis [TA]

con·junc·ti·val sac

(kŏn-jŭngk'tī'val sak) [TA] The space bound by the conjunctival membrane between the palpebral and bulbar conjunctivae, into which the lacrimal fluid is secreted; it opens anteriorly between the eyelids.
Synonym(s): saccus conjunctivalis [TA] .

conjunctiva

A thin transparent mucous membrane lining the posterior surface of the eyelids from the eyelid margin and reflected forward onto the anterior part of the eyeball where it merges with the corneal epithelium at the limbus. It thus forms a sac, the conjunctival sac, which is open at the palpebral fissure and closed when the eyes are shut. The depths of the unextended sac are 14-16 mm superiorly and 9-11 mm inferiorly. The conjunctiva is divided into three portions: (1) The portion that lines the posterior surface of the eyelids is called the palpebral conjunctiva. It is itself composed of the marginal conjunctiva, which extends from the eyelid margin to the tarsal conjunctiva; the tarsal conjunctiva, which extends from the marginal conjunctiva to the orbital conjunctiva; and the orbital conjunctiva, which extends from the tarsal conjunctiva to the fornix. (2) That lining the eyeball is the bulbar conjunctiva. It is itself composed of the limbal conjunctiva, which is fused with the episclera at the limbus and the scleral conjunctiva, which extends from the limbal conjunctiva to the fornix. (3) The intermediate part forming the bottom of the conjunctival sac, unattached to the eyelids or the eyeball and joining the bulbar and the palpebral portion is called the fornix (conjunctival fold, cul-de-sac). See dyskeratosis; lid eversion; conjunctival gland; Krause's end bulbs; subtarsal sulcus.

单词	conjunctival sac
释义	DictionarySeeconjunctiva conjunctival sac sac [sak] a baglike organ or structure; see also bag, pocket, and pouch.air s's (alveolar s's) the spaces into which the alveolar ducts open distally, and with which the alveoli communicate; see also lung" >lung.amniotic sac the sac formed by the amnion, enclosing the fetus suspended in amniotic fluid; popularly known as the bag of waters.conjunctival sac the potential space, lined by conjunctiva, between the eyelids and the eyeball.endolymphatic sac the blind, flattened cerebral end of the endolymphatic duct.hernial sac the peritoneal pouch that encloses protruding intestine.lacrimal sac the dilated upper end of the nasolacrimal duct; see also lacrimal apparatus.yolk sac the extraembryonic membrane connected with the midgut; in vertebrates below true mammals, it contains a yolk mass.Yolk sac in a developing embryo. From Applegate, 2000. con·junc·ti·val sac [TA] the space bound by the conjunctival membrane between the palpebral and bulbar conjunctiva, into which the lacrimal fluid is secreted; it is a closed space when eye is closed; when eye is open, the sac is open anteriorly through the palpebral fissure (between the eyelids). Synonym(s): saccus conjunctivalis [TA] con·junc·ti·val sac (kŏn-jŭngk'tī'val sak) [TA] The space bound by the conjunctival membrane between the palpebral and bulbar conjunctivae, into which the lacrimal fluid is secreted; it opens anteriorly between the eyelids. Synonym(s): saccus conjunctivalis [TA] . conjunctiva A thin transparent mucous membrane lining the posterior surface of the eyelids from the eyelid margin and reflected forward onto the anterior part of the eyeball where it merges with the corneal epithelium at the limbus. It thus forms a sac, the conjunctival sac, which is open at the palpebral fissure and closed when the eyes are shut. The depths of the unextended sac are 14-16 mm superiorly and 9-11 mm inferiorly. The conjunctiva is divided into three portions: (1) The portion that lines the posterior surface of the eyelids is called the palpebral conjunctiva. It is itself composed of the marginal conjunctiva, which extends from the eyelid margin to the tarsal conjunctiva; the tarsal conjunctiva, which extends from the marginal conjunctiva to the orbital conjunctiva; and the orbital conjunctiva, which extends from the tarsal conjunctiva to the fornix. (2) That lining the eyeball is the bulbar conjunctiva. It is itself composed of the limbal conjunctiva, which is fused with the episclera at the limbus and the scleral conjunctiva, which extends from the limbal conjunctiva to the fornix. (3) The intermediate part forming the bottom of the conjunctival sac, unattached to the eyelids or the eyeball and joining the bulbar and the palpebral portion is called the fornix (conjunctival fold, cul-de-sac). See dyskeratosis; lid eversion; conjunctival gland; Krause's end bulbs; subtarsal sulcus.
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