After a brain injury, a class of glial cells called frontal restores the barrier between the brain and blood. Astrocytes , oligodendrocytes, microglia and ependymal cells.
Controlling interstitial environment maintain the blood brain barrier, creating three dimensional framework for CNS , performing repairs in damaged neural tissues and guides neuron development. Highly selective semipermeable membrane barrier that separates the circulating blood from the brain extracellular fluid in the central nervous system.
The blood brain is multicellular , compound structure composed of endothelial cells, pericytes and astrocytes in direct contact with brain tissues. The purpose is to protect against circulating toxins and pathogen that could cause brain infections at the same time which allows vital nutrient to reach brain.
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