Neural tissue

Nerve Tissue 

Nervous tissue is a communicating network which conducts and transmits impulses through the whole body.

Structure
The nervous system of the body can be devided into two major parts which are:

-The central nervous system (CNS)
CNS consists of the brain and the spinal cord which are responsible for analysis and integration.

-Peripheral nervous system (PNS)
PNS is the carrier and conductor of depolarization waves from and to the CNS through its branches.

These processes allow the body to function, coordinate and respond to stimuli. The PNS and CNS network together in the whole body by receiving and conducting electrical impulses through the structural and functional nerve cells, the neurons. Each neuron consists of an axon, a dendrite and soma which are extended like cables in the body and are responsible for our sensory and motoric abilities.

Types
There are different types of neurons which can be classified into three major groups:

Unipolar neurons
More than 95% of neurons in the body are multipolar neurons. It can be said that our interacting with the world occurs through the electric impulses. These happen when the membrane potential of nerve cells change into positive or negative charges.

Ionic gradient
By resting and action potential all impulses can be transmitted through the body.

The inward of the cell has a negative charge referred to the outside. This is a condition of the resting potential. Once the inside potential gets positive, it becomes an action potential. This means that the concentration of ions inside and outside the cell determine the charge and condition of the nerve cells and contribute the required condition. The most crucial ions around the cell membrane are Na+, K+, Cl, and Ca²+. Usually there are also negative proteins within the cell. There are much more K+ ions than Na+ inside the cell during the resting potential.

The process of action potential occurs around the axons through the membrane and Na+ and K+ channels when the inside potential of the cell changes from negative to positive.This depolarization stimulates and creates a condition which cause the rapid nerve impulses though the axons.

Process of action potential