blood-aqueous barrier


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barrier

 [bar´e-er]
1. an obstruction.
2. a partition between two fluid compartments in the body.
3. a covering used to prevent contact with body fluids.
alveolar-capillary barrier (alveolocapillary barrier) see under membrane.
blood-air barrier alveolocapillary membrane.
blood-aqueous barrier the physiologic mechanism that prevents exchange of materials between the chambers of the eye and the blood.
blood-brain barrier see blood-brain barrier.
blood-gas barrier alveolocapillary membrane.
blood-testis barrier a barrier separating the blood from the seminiferous tubules, consisting of special junctional complexes between adjacent Sertoli cells near the base of the seminiferous epithelium.
barrier methods contraceptive methods such as condoms and diaphragms in which a plastic or rubber barrier blocks passage of spermatozoa through the vagina or cervix. See discussion under contraception.
placental barrier the tissue layers of the placenta which regulate the exchange of substances between the fetal and maternal circulation.

blood-a·que·ous bar·ri·er

a selectively permeable barrier between the capillary bed in the processes of the ciliary body and the aqueous humor in the anterior chamber of the eye; consists of two layers of simple cuboidal epithelium joined at their apical surfaces with junctional complexes.

blood-a·que·ous bar·ri·er

(blŭd-ā'kwē-ŭs bar'ē-ĕr)
A selectively permeable barrier between the capillary bed in the ciliary body and the aqueous humor.
References in periodicals archive ?
Therefore, we hypothesize that residual LECs may release proinflammatory cytokines (TNF-[alpha] and IL-1[beta]) consistently, which leads to anterior capsule opening fibrosis, and attach tightly to the anterior surface of PC-IOL; then, opaque substances accumulate and a spot of proinflammatory cytokines leak to aqueous humor, leading to blood-aqueous barrier breakdown.
The anterior segment of the eye has a selective barrier (blood-aqueous barrier), which controls the flux between the blood current and the primary aqueous humor (GUM et al., 1999).
Ambrose, "Blood-aqueous barrier breakdown associated with rhegmatogenous retinal detachment," Eye, vol.