The blood-brain barrier consists of a network of capillaries that connects the arteries and veins of the brain that prevent the passage of unwanted macromolecules and fluids from leaking into the brain parenchyma.

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The blood-brain barrier mainly consists of specialized capillaries that prevent the passage of unwanted macromolecules and fluids from leaking into the brain tissue. These capillaries are highly regulated by tight junctions between the endothelial cells that line the capillary walls. The blood-brain barrier is essential for maintaining the stable environment of the brain parenchyma and protecting it from harmful substances circulating in the blood.

The Blood-Brain Barrier Consists of a Network of Capillaries That