Your brain is made up of 100 billion nerve cells called neurons. These neurons then gather
together and give off specific signals. what differs these neurons from other cells are their electrohemical charateristic.
This allows them to send signals over long distances in order to pass messages to each other. These neurons can
send signals up to sevral meters or even feet.
Figure 1: Neuron Digram. Dendrites, Nucleus, Axon, Mylein Sheath, Soma, Bouton
Neurons are composed of 3 parts which include:
The cell body
The Cell Body: the cell body is the most
important part as it holds the nucleus, the endoplasmic reticulum, ribosomes and the mitochondira. If th cell were biody
were to die, the neuron also dies.
Axon: These appear to be a long cable like
projection of the cell that carries the nerve impulse or action potential. Depending on the type of neuron axons are
covered with a this layer of mylein.
Mylein: Mylein is made of fat and and
it helps to speed transmission of a nerve impulse down a long axon.
Dendrites: These appear to be branch projections
located on both ends of the cell. The dendrites allow the neurons to communicate with other cells.