Episode 123: Respiratory and Circulatory Systems Part 2
The Science of Everything Podcast
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How Does the Blood Brain Barrier Work?
The blood brain barrier is a series of mechanisms that prevent the normal processes of exchange occurring between the capillaries in the brain and the actual brain tissue. So water, oxygen, glucose and other nutrients go out. They sneak through the gaps around between the capillary cells an enter the inciditial fluid in the arterial end. waste products as well as water a sneak through and enter the the capillary bed from the distrial fluid at the venus end. And that's mediated by pressure differences as well as concentration gradients and partial pressures of the gases.
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