The human body is made up of many cells which form and create different tissues and organs within the body. Control and coordination are required to enable all functions within the body to work accordingly and appropriately at the specific times required. The system within the body which assists to control and coordinate the functioning of all the systems is called the nervous system. The nervous system works alongside the endocrine system allowing communication and coordination between the many organs and systems within the human body. This allows them to function correctly, and have the ability to respond to stimuli when needed. The nervous system has two main systems within itself. These are the central nervous system known as CNS, and the peripheral system known as PNS. The central nervous system is often referred to as the ‘controller’ within the human body; the CNS consists of the brain and the spinal cord. The peripheral nervous system is often referred to as the ‘reactor’ within the human body, as this includes the sensory and motor nerves, connecting the CNS with the sense organs, glands and muscles within the body.
The foundation within the central nervous system is the neuron; neurons are cells within the body which specialise within a specific area. Neurons which are nerve cells are specifically used to transmit, and carry information throughout the body. Neurons are used to transmit by electrical and chemical forms throughout the body.
All Neurons have a cell body and have one or more fibres, these fibres vary in length and can be as small as to be microscopic or to the length of over a meter. There are two different types of fibres, the dendrites are the fibres which carry the information towards the cell body,