Blood-brain barrier - Definition


The blood-brain barrier is a group of cells that block the blood in the brain in order to regulate its flow. The barrier also has a role in the protection of the central nervous system against pathogenic agents, toxins, and certain hormones present in the blood. Only nutrients that are necessary to cerebral functioning can pass through the blood-brain barrier, which sometimes blocks medications, especially those that are neurological.
Published by Jeff. Latest update on November 12, 2013 at 05:45 AM by Jeff.
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