noun
blood-brain barrier
A physiological barrier between the bloodstream and the brain. Used in medical and biological contexts.
血液脳関門は、有害な物質が脳に入るのを防いでいる。
The blood-brain barrier prevents harmful substances from entering the brain.
Compound of 血液 (blood), 脳 (brain), and 関門 (barrier/gate). A direct translation of the English medical term 'blood-brain barrier'.