Type O negative blood (red cells) can be transfused to patients of all blood types. It is always in great demand and often in short supply. Type AB positive plasma can be transfused to patients of all other blood types. AB plasma is also usually in short supply.
Blood-brain barrier. A blockade of cells separating the circulating blood from elements of the central nervous system (CNS); it acts as a filter, preventing many substances from entering the central nervous system.
Making the world better, one answer at a time. Blood brain barrier is formed by specific nueroglial cells called astrocytes.These astrocytes are of two types :1) Fibrous astrocytes and 2) protoplasmic astrocytes.The fibres of these astrocytes forms a network with capillaries of blood vessels that supply blood to brain.aking the world better, one answer at a time. Blood brain barrier is formed by specific nueroglial cells called astrocytes.These astrocytes are of two types :1) Fibrous astrocytes and 2) protoplasmic astrocytes.