Glial cells provide scaffolding on which the nervous system is built, help neurons line up closely with each other to allow neuronal communication, provide insulation to neurons, transport nutrients and waste products, and mediate immune responses. Glial cells are traditionally thought to play a supportive role to neurons, both physically and metabolically. The nervous system is composed of two basic cell types: glial cells (also known as glia) and neurons. Learning how the body’s cells and organs function can help us understand the biological basis of human psychology. Psychologists striving to understand the human mind may study the nervous system.
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