Critical reading means engaging in what you read by asking yourself questions such as, âwhat is the author trying to say?â or âwhat is the main argument being presented? Critical reading involves presenting a reasoned argument that evaluates and analyses what you have read.
Glial cells, sometimes called neuroglia or simply glia (Greek Î³Î»Î¯Î± and Î³Î»Î¿Î¯Î± glue; pronounced in English as either /ËÉ¡liËÉ/ or /ËÉ¡laÉªÉ/), are non-neuronal cells that maintain homeostasis, form myelin, and provide support and protection for neurons in the central and peripheral nervous systems.
The central nervous system consists of neurons and glial cells. Neurons constitue about half the volume of the CNS and glial cells make up the rest. Glial cells provide support and protection for neurons. They are thus known as the supporting cells of the nervous system.The four main functions of glial cells are: to surround neurons and hold them in place, to supply nutrients and oxygen to neurons, to insulate one neuron from another, and to destroy and remove the carcasses of dead neurons (clean up).hey are thus known as the supporting cells of the nervous system. The four main functions of glial cells are: to surround neurons and hold them in place, to supply nutrients and oxygen to neurons, to insulate one neuron from another, and to destroy and remove the carcasses of dead neurons (clean up).