Introduction 

Central nervous system or CNS is composed of several neurons that build nervous tissue that helps in transmitting impulses; some neurons do not impulses but transmit signals from one neuron to another. Nervous tissue is a group of organized structures of nerve cells that supports many-body systems such as transmitting signals, balancing the body and coordination. This tissue is grouped into two main parts Neuron and Neuroglia. Neurons help in transmitting electrical signals through neurotransmitters that use chemicals such as adenyl choline. Neuroglia do not transport signals but support and protect Neurons.

Nervous Tissue

Nervous tissue makes the nervous system in the human body subdivided into two parts such as the Central nervous system of CNS and peripheral nervous system. CNS comprises Brain and spinal cord whereas the peripheral nervous system consists of a branch that spreads throughout the body. Nervous system is again subdivided into two systems such as the Sympathetic Nervous system or SNS and the Parasympathetic Nervous System or PNS. SNS activates and stimulates fight responses in organisms when organisms counter with threats such as SNS activates and causes dilation of pupils in eyes, increases heart rates, and increases sweat secretion in hot weather. PNS is activated at the time of rest and digestion of the body. Autonomic nervous system regulates unconscious performances of bodies and the somatic body system regulates voluntary movements of bodies. Nervous tissue is made up of two types of cells that consist of neurons and glial cells. Neurons are the basic type of cells that are responsible for transporting electric impulses from stimulator to the reactor. 

Structure Nervous Tissue

Nervous tissue is composed of neurons that consist of three parts as Axon, cell body and dendrites. They are aromatic in nature if a neuron is destroyed it cannot be replaced as they are non-dividing cells and do not go through mitosis. The Cell body of Neuron is similar to other cells in the body; it has a nucleus with at least one nucleus and also contains cytoplasmic organelles. It is a non-dividing cell as it lacks centriole that helps in cell division. Dendrites and axons are cytoplasmic extensions of the cell body of neurons that help to connect with other neurons by synapsis that helps to transmit signals all over the body. Dendrites are mainly fibers and the length of them varies in different types of neurons such as sensory neurons have long dendrites and motor neurons have small dendrons. These neurons are placed in neural tubes and then these Nerve fibers make nerve tissues. A nerve fiber consists of more than 100,000 nerve fibers in Vertebrates. 

Types of Nervous Tissue

Nervous muscles contain neural cells that transmit impulses and action potentials. An action potential is a sudden fall in EMP or electrical membrane potential of neurons. There are mainly three types of neurons: sensory, motor and Interconnected neurons. Sensory neurons or sensory nervous tissues are responsible for converting external stimuli into internal electric impulses. Its carrier signals from the outer part of the body to the central nervous system. These neurons are unipolar. It consists of long dendrons and a short axon. These sensory neurons are found in the eyes, skins, ears and tongue. In an adult, more than 10 million sensory neurons are found.  Motor Neurons or motor nervous tissues control effector organs like glands, muscles. It carries signals from the CNS to the outer body surfaces and also stimulates glands and muscles to activate for responding. It is multipolar with a long axon and short dendrons. This type of tissue is mainly found in muscles and glands. Interconnected neurons or interconnected nervous tissues do not transmit any electric impulses but inner joints sensory and motor neurons. They simply receive signals from one neuron and transmit signals to other neurons. Such as it receives signals from sensory neurons and transmitted them to motor neurons. 

Example of Nervous Tissue

There are several examples of nervous tissues such as Neuroglia that includes six types of neuroglia. This includes glial cells that are involved in many functions that support neurons. Astrocytes start like an abundant glial cell that is a component of the Central Nervous system that includes many radiating processes that help in clinging to the neuron and capillaries. Microglial cells are thorny and spiny processes of CNS. 

Conclusion

Nervous tissue is composed of nerve cells that help to transport electric impulses from acceptor to receiver and from receiver to acceptors. Sensory nervous tissues transfer electric impulses from the receptor to the brain of CNS and Motor nervous tissue transfers electrical impulses from CNS to the regulatory glands and muscles. These cells are nondividing thus they cannot be replaced if damaged. This has main functions such as balancing and coordination of the body. Structure of a neuron comprises three parts such as axon, dendrites and cell bodies. Dendrites and axons help to connect neurons with each other by synapsis.