What Are Capillaries?
Reviewed: Dr. Gromatzky
5. Blood-Brain Barrier
It is essential that we help to keep our brains free from toxins and other items that might do it harm. There are often many such toxins flowing through our blood, however, but we have a system in place that prevents these from getting to the brain.
This is known as the blood-brain barrier, and it only allows harmless particles to pass from the bloodstream into the brain. While this is obviously very important to us, it is not without its drawbacks. The barrier also prevents some important medications from passing through, meaning they are unable to treat conditions affecting the brain.
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