![](http://www.alamy.com/thumbs/6/7FDB485F-C941-434F-B6EA-AB346C2980EA/2AD18WH.jpg)
The blood-brain barrier is a highly selective permeable membrane that controls what substances pass from the blood stream into the brain.
Size: 6060px × 4039px
Photo credit: © CAROL & MIKE WERNER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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