Did you know Nervous System In Humans.

The nervous system is itself a form of coordination system conduction of nerve impulses to the central nervous system, here the processing of nerve impulses and also commands that will provide a stimulus response. Nerve cell or neuron is the smallest unit in the working deploy nervous system itself. The nervous system itself has a role in the process that allows the body irritability living creatures that can adapt and respond to changes which occur in the environment. The nervous system is certainly divided into two central nervous system and peripheral nervous system. The central nervous system consists of the brain, spinal cord, to the peripheral nervous system itself consist of two is also the somatic and autonomic systems.

Parts of the nerve cells (neurons).

Work nervous system is strongly influenced how its constituent nerve cells. There are billions of nerve cells that make up the nervous system. These nerve cells that play a role in the continuing stimulation of the senses to the brain is returned to the muscles, and vice versa.
Some components or parts of the nerve cells are:
Nerve cells or neurons composed by three main parts:
- Body cells, dendrites and neurites (axons)

a. The cell body.

Characteristic feature of neuronal cell bodies are gray, and there is a cell membrane, nucleus, nucleoli, sitplasma and reticulum Endoplasma.Inti nerve cells acts as a central regulator of nerve cell itself.

b. Dendrite.

Denderit is a branch of the nerve cell body, dendrites role in receiving impulses that come dri other end of the axon, these impulses of dendrites brought to the cell body. Dendrites are also often referred to as short-fiber neurons.

c. Neurites (axons).

Neurites (axons) is often also referred to as the long fibers of neurons. Neurites function is to forward part impulses from the nerve cell body to the cells - other nerve cells. Neurites wrapped by myelin sheath, this sheath composed by Schwan cells. Myelin acts as an insulator and protects neurites.

Part neurites that do not have a sheath called nodes of Ranvier. Node of Ranvier is what plays a role in accelerating the course of the process of impulses. At the other end branching neurites called terminal which will be met by the end of the dendrites of other nerve cells. The meeting between the two ends of nerve cells called synapses

The nervous system in humans that actually consists of several structures of nerve cells which normally known as neurons and also gilial cells, cells that function as a means to deliver the impulses of the senses to get to the brain. Will be directly sent from the brain to the muscles to, but different from gilial cell which has a function for giving nutrients to neurons.

The human nervous system is divided into two parts, namely the nervous system consciously and nervous system involuntary (autonomic), in which the nervous system consciously divided into the central nervous system and peripheral nervous system, while the nervous system is unconscious is divided into the sympathetic nervous system and the parasympathetic nervous system following The second discussion of the nervous system namely central nervous system and peripheral nervous system

Central Nervous System.

Our central nervous system is composed of the brain and marrow. Parts of the brain and the marrow was covered by a layer of the meninges, while the meninges layer composed by durameter, arachnoid, pia mater, subarachnoid space.

Some explanation of each are as follows:

a. Durameter

Durameter is a membrane which is located in the outermost part of the brain and skull are attached to the inside

b. Arachnoid. 

Meninges layer is shaped like a profit - profit.

c. Pia mater.

Layer is located on the inside of the meninges layer, this layer is the thinnest part and there are too many red blood cells in this section.

d. Subarachnoid space.

Is a room that contains fluid to protect the brain called cerebrospinal fluid. This fluid will protect us from the central nervous system and cause brain pressure shock at all.

Brain.

The brain is a major part of the central nervous system, the brain itself when examined it will show the division by 5 parts, namely a large brain (cerebrum), small brain (cerebrum), midbrain (mesensefalon), the forebrain (diesensefalon) Bridge Varol (ponds Varoli ).

Some explanations about the brain and its functions.

(1) Large brain (cerebrum).

The human brain has a structure composed folded - fold with the very large compared to some other animals. The size of the brain will not give effect to the size of the size of our heads. Big brain is a determinant of a person's intelligence, especially on the gray outer part (cortex) of the brain's why gray? because it contains a lot of nerve cell bodies is called substance grissea. Albert Einstein had a lot of gray matter in the brain, there is a large part of the cerebrum of the brain (medulla), which has a white color due to the content of dendrites and axons are very much substance is often called alba.

(2) Central Brain (mesensefalon).

Midbrain has a place at the front of the small brain (cerebrum) and bridge Varol. The middle brain and eye function to reflex muscle contractions continue doing - constantly.

(3) Brain Home (diencephalon)

 Human forebrain has 2 parts lobe is as follows:

(a) The thalamus.

Thalmus section serves to receive stimuli from all the body except the smell receptors to the sensory perceptions of the cerebrum and do pain and provide a sense of fun.

(b) The hypothalamus.

The hypothalamus is the part of the central coordination of the peripheral nervous system (autonomic) functions is to regulate the temperature of the human body in order to always be in a comfortable condition and always remain, it also regulates hunger in humans, regulates emosis, regulate blood pressure and regulate the amount of water content in body, blood sugar is regulated by the hypothalamus.

(4) Small brain (cerebellum).

The cerebellum is in the back right under our big brains. This little brain function regulate muscle work, regulate the balance

(5) Bridge Varol (Ponds Varolii).

Varol bridge is a small bridge that connects the multiple parts of the brain for example, a bridge between the cerebellum Varol connect the left and the right, connecting the big brain and spinal cord. Varol bridge serves to deliver the stimulation of a brain region to another.

Marrow.

In the marrow are further divided into 2 parts, no spinal cord or commonly called the spinal cord and the medulla oblongata advanced marrow.

Some explanation of the marrow are:

(1) Advanced marrow (medulla oblongata).

Advanced marrow is the part that is a continuation of the brain located at the back of the brain. Advanced marrow role in regulating heart rate, helps breathing, movement swallowing, belching, vomiting, blood vessels constrict.

(2) Spinal cord (spinal cord).

The spinal cord is part of a continuation of the medulla oblongata, the part of the spinal cord has a length of up to the second part of the spine. the center of the nerves are cerebrospinal fluid. Spinal cord function is to connect the stimulation of the brain and leading to the brain and can also perform a reflex.

The peripheral nervous system.

Peripheral Nervous System.
Has a function to give information from a central regulator and to pagian central regulator. The peripheral nervous system is composed of millions and even billions of cells that Sarah will bring stimulus to the central nervous system.

Based nerve stimulation brought, the peripheral nervous system is divided into two sections as follows:

a) afferent nerve system
b) nervous system efferent

Based on the origin of the nervous system can be divided into the brain's nerve (cranial) and the spinal cord nerve (cranial).

Involuntary nervous system.

Unconscious Nervous System (Autonomous) is a nervous system in your body that works without your knowledge, you can only see and feel the impact, for example, when you sweat and your heart rate appears and going it alone without your command. Involuntary nervous system has a very good role in the body ie moving intestine, smooth muscle, expands the flat-pupil, and contract the blood vessels, sweat, you must be very tired when should control one by one.

The autonomic nervous consists of two kinds :

1) sympathetic nerves.

The sympathetic nervous nerve roots are found in the spinal cord (spinal cord) around your chest or waist. Its function is to accelerate the functions and work of the organs - organs that are important.

2) parasympathetic nerves.

Parasympathetic nerve is the nerve that lies at the base of advanced marrow (medulla oblongata). Parasimpateteik nerve function in contrast to the sympathetic because she actually slow down the work of the organ - which is an important organ of our body

Diseases of the Nervous System Human.

There are several diseases of the human nervous system. Some of these disorders can be caused due to damage nerve cells so that it can not work properly. The damage may be due to drinking alcohol, virus attacks, and result in accidents. well here we will discuss some of these abnormalities

a. Meningitis.

Meningitis is an inflammatory disease that occurs in the lining of the brain. This disease can be caused by viruses or bacteria. Need special handling when exposed to the disease

b. Neuritis.

Neuritis disease is a nerve cell sangguan the edge (peripheral) caused by inflammation, poisoning occurs and high pressure.

c. Disease apoplexy.

Concussions are diseases of the nervous system caused by a collision very hard in the head, causing brain damage. So that concussions can be cured then need medication that nerve cells can function normally again.

d. Parkinson's disease.

Parkinson's disease is a disease caused by damage to any part of the brain involved in controlling muscle movement. As a result, the brain can not work optimally. Parkinson's is a characteristic feature of the body is always shaking and some body parts pain when walking, coordinate and moves a little.

Similarly, information on the human nervous system in which nerve is certainly a part that is sensitive and important for our body system.
Thank you for reading this article. Written and posted by Bambang Sunarno. sunarnobambang86@gmail.com
author:
https://plus.google.com/105319704331231770941.
name: Bambang Sunarno.
http://primadonablog.blogspot.com/2015/09/did-you-know-nervous-system-in-humans.html
DatePublished: 10 September 2015 09:43

Tag : Did you know Nervous System In Humans.

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