Neurone. A structure and a functional unit of Narva system is called Neurone. It is a typical cell presenting in Narva system. It is made up of, or it has different parts like cell body, which contains nucleus at the center and denrites or a fibrous structure along the cell body, which is called denrites. Argjan, elongation from nucleus and having Argjan terminals. Functions of different parts of Neurone are denrites collect impulses from muscles to cell body or at nucleus. This control all the functions of the cell. Argjan transmits such impulses from one neuron to another or Argjan transmits impulses from Neurone to Neurone. One terminal join one neuron with another and in this way it forms fibrous knobs. These knobs transmit signals or in this way neuron transmit impulses from one neuron to another in the knobs and accordance with function of Narva system we have sensation of stimulation and body show responses.