THE NERVOUS SYSTEM: THE BODY'S COMMAND CENTER
Have you encountered a situation that is a matter of life and death? Like
if you are going fast and going to hit a car. You will probably reacted with an
automatic response by running to the side of the road to avoid the accident.And you are probably wondering how you reacted fast and made a very quick
reaction.
NEURONS
Well I learned that Neurons or Nerve cells are the one responsible for our quick responses and our natural actions. Because they are the one that sends the information through the nervous system in the form of nerve impulses. Neurons are unique because, unlike any other cells in the body, neurons don't reproduce. but don't worry we are born with neurons that is more than enough for a lifetime.
 |
| Figure 1 The Parts of a Neuron |
The neurons have parts just like our body they have a purpose. The Cell body the largest part of the neuron holds the nucleus which controls all the activities of the cell. Dendrites are a threadlike structures that receives and carry information toward the cell body. axon a taillike fiber that extends from the cell body, carries messages away from the cell body. The myelin sheath covers the axon, which speeds up the travel of the nerve impulses. Axon terminal passes the message to the dendrites of other neurons.
 |
| Figure 2 Types of Neurons |
