Neurons
Types of Neurons (Nerve Cells). The human body is made up of trillions of cells. Cells of the nervous system, called nerve cells or neurons, are specialized to carry messages through an electrochemical process. The human brain has approximately 100 billion neurons. To learn how neurons carry messages, read about the action potential. Neurons come in many different shapes and sizes. The brain is made up of billions of nerve cells that communicate with each other through a network of nerves. Messages between the brain and parts of the body travel through nerves in the spinal cord. The main parts of the brain are: 1  The cerebrum – it is the largest area, made of two halves. Neuron Structure. Your brain is made of approximately 100 billion nerve cells, called neurons. Neurons have the amazing ability to gather and transmit electrochemical signals -- think of them like the gates and wires in a computer. The brain is made up of billions of nerve cells, called neurons. They communicate with each other, and other parts of the body by sending messages (nerve impulses) through a network of nerves. Nerve cells are held in place and supported by glial cells. The central nervous system (which includes the brain and spinal cord) is made up of two basic types of cells: neurons (1) and glia (4) & (6). Glia outnumber neurons in some parts of the brain, but neurons are the key players in the brain. The nervous system is a complex organ made up of nerve cells (also called neurons) and glial cells, which surround and support neurons (see Figure 3.1). Neurons send signals that affect numerous functions including thought processes and movement.
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the brain is made up of about nerve cells