In the central nervous system, the blood–brain barrier protects the neurons from many blood-borne substances by sealing the spaces among endothelial cells lining the internal surface of blood vessels. The structures that seal the intercellular spaces are In the central nervous system, the blood–brain barrier protects the neurons from many blood-borne substances by sealing the spaces among endothelial cells lining the internal surface of blood vessels. The structures that seal the intercellular spaces are

Tight junctions
Gap junctions
Communicating junctions
Desmosomes

It is very important to use credit wisely for a few reasons.

1) You have to be very careful and conscientious about your credit because one missed payment and your credit score will fall.

2) You need to make sure you keep your credit up because if you ever have plans to buy a house or a new car or a piece of land, you'll more than likely need credit to do so and if you haven't been wise about it, your credit won't be good enough for any of those things.

These reasons, among others, are why you need to be very wise about and pay attention to your credit. Without good credit, you won't get very far in life.