Neuron (Nerve) Cell Model

Neuron (Nerve) Cell Model

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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 86 billion neurons. 

Neurons come in many different shapes and sizes. Some of the smallest neurons have cell bodies that are only 4 microns wide. Some of the biggest neurons have cell bodies that are 100 microns wide. (Remember that 1 micron is equal to one-thousandth of a millimeter!).

Neurons are similar to other cells in the body because:

  1. Neurons are surrounded by a cell membrane.
  2. Neurons have a nucleus that contains genes.
  3. Neurons contain cytoplasm, mitochondria, and other organelles.
  4. Neurons carry out basic cellular processes such as protein synthesis and energy production.

However, neurons differ from other cells in the body because:

  1. Neurons have specialized in cell parts called dendrites and axons. Dendrites bring electrical signals to the cell body and axons take information away from the cell body.
  2. Neurons communicate with each other through an electrochemical process.
  3. Neurons contain some specialized structures (for example, synapses) and chemicals (for example, neurotransmitters).