English Dictionary

blood-brain barrier

noun

(anatomy) A structure in the central nervous system (CNS) that keeps various substances found in the bloodstream out of the brain while allowing in the substances essential to metabolic function, e.g. oxygen.

The blood-brain barrier is a protective barrier that prevents harmful substances from entering the brain.

意味（1）

(anatomy) A structure in the central nervous system (CNS) that keeps various substances found in the bloodstream out of the brain while allowing in the substances essential to metabolic function, e.g. oxygen.

The brain and spinal cord are insulated by a tight cellular seal called the blood-brain barrier that prevents foreign chemicals from easily getting into the brain.