TYPES AND FUNCTIONS OF GLIA (neuroglia)

-50% of all brain cells

-generally form functions of support and protection

-form a supporting network by twining around nerve cells in brain

and spinal cord

-bind nervous tissue to supporting structures

-attach neurons to their blood vessels

-some small cells are phagocytotic

- clean up brain "debris",

- engulf invading microbes

- digest parts of dead neurons

-provide insulation to neurons

Schwann Cells

-form a thick, fatty sheath (myelin) to insulate neurons in the

peripheral NS

Oligodendroglia (oligodendrocytes)

-form a thick, fatty sheath (myelin) to insulate neurons in the

central NS