Obstacles in the way of progress, mutual understanding, negotiated settlements, etc. [D02404]

Depicted occasionally in manuscript references, most of the 14th century examples seem to have taken place during a siege. The gateway to a castle is opened, after a wooden barricade, resembling a con [..]

Obstacles that prevent people with disabilities from fully participating in society.  [These include:]

In diffusion

The barrier between Capillary Blood and alveolar air comprising the alveolar Epithelium and Capillary Endothelium with their adherent Basement Membrane and Epithelial Cell Cytoplasm. Pulmonary Gas Exc [..]

The selectively permeable barrier, in the EYE, formed by the nonpigmented layer of the Epithelium of the Ciliary Body, and the Endothelium of the Blood Vessels of the Iris. Tight Junctions joining adj [..]

The barrier between the perineurium of Peripheral Nerves and the Endothelium (Endothelium, Vascular) of endoneurial Capillaries. The perineurium acts as a Diffusion barrier, but ion Permeability at th [..]

Those factors, such as Language or sociocultural relationships, which interfere in the meaningful interpretation and transmission of ideas between individuals or groups.

A specialized barrier in the Kidney, consisting of the fenestrated Capillary Endothelium; Glomerular Basement Membrane; and glomerular Epithelium (Podocytes). The barrier prevents the Filtration of Pl [..]

Specialized non-fenestrated tightly-joined Endothelial Cells with Tight Junctions that form a transport barrier for certain substances between the cerebral Capillaries and the Brain Tissue.

A specialized transport barrier, in the EYE, formed by the Retinal Pigment Epithelium, and the Endothelium of the Blood Vessels of the Retina. Tight Junctions joining adjacent Cells keep the barrier b [..]

A specialized barrier, in the Testis, between the interstitial Blood compartment and the adluminal compartment of the Seminiferous Tubules. The barrier is formed by layers of Cells from the Vascular E [..]

barrier|lang=en

Barriers are those things that prevent movement, or make access to a service more difficult for certain groups and individuals. Barriers exist at different levels, and may be personal, cultural, institutional and structural.