Changes

==Endothelial Cells and the [[Blood Brain Barrier - Anatomy & Physiology|Blood Brain Barrier]]==

==Endothelial Cells and the [[Blood Brain Barrier - Anatomy & Physiology|Blood Brain Barrier]]==

 

The walls of capillaries within the CNS are formed by endothelial cells, as for capillaries elsewhere in the body.

* The walls of capillaries in the CNS are formed by endothelial cells, as for capillaries elsewhere in the body.

* However, in the CNS capillary endothelial cells are very tightly packed.

* However, in the CNS capillary endothelial cells are very tightly packed.

** This density of cells restricts passage of substances out of the bloodstream much more than endothelial cells in capillaries elsewhere in the body.

** This density of cells restricts passage of substances out of the bloodstream much more than endothelial cells in capillaries elsewhere in the body.