Nervous+System

= Nervous System =

Functions
The nervous system is one of the main controlling and communicating system in the body. It is the center of all thought. Your nervous system is the main part of your body. It’s what helps you do everything like allow you to write, pick things up, and even read this now! When a nerve feels something happening to your body, it sends a message to your brain telling your brain how to feel.

Major Organs
The major organs are the nerves all throughout the body and mainly the brain. The brain is the main control center of the body. Your brain is the main part of the nervous system. It weighs three pounds. Did you know that your brain helps you keep your balance? Your brain has two parts, the left side and the right side. The right side of your brain controls the left side of your body and your left side of brain controls your right side. Did you know there are over 100 billion nerve cells in your brain that are microscopic? The nerves throughout the body send messages to the brain to inform the body of how to react.

Central Nervous System (CNS)
The nervous system is split into two main parts. The central nervous system represents the largest part of the nervous system, including the brain and the spinal cord. The average brain weighs about three pounds. It has a skull that protects the CNS, and is located in the cranial cavity. It has alot of control over human behavior.

Peripheral Nervous System (PNS)
The Peripheral Nervous system is the part of the nervous system that includes the nerves that are outside the brain or spinal cord. If damaged, peripheral nerves have the ability to regenerate. The Peripheral Nervous System consists of sensory neurons from stimulus receptors that inform the CNS of stimuli. The peripheral nervous system or PNS can be divided into the somatic nervous system and the autonomic nervous system. The PNS is not protected by bone, leaving it open to injury. Peripheral Nervous system is unlike the central nervous system, which is made of the brain and spinal cord, to serve the limbs and organs.

**Senses**

 * The Sense of Sight:** From the moment you wake up in the morning to the time you go to sleep at night, your eyes are acting like a video camera. Everything you look at is then sent to your brain for processing and storage much like a video cassette. This is a very simplified explanation, but as you read on, you will discover why the sense of sight is actually considered the most complex of the five senses.
 * The Sense of Touch:** While your other four senses (sight, hearing, smell, and taste) are located in specific parts of the body, your sense of touch is found all over. This is because your sense of touch originates in the bottom layer of your skin called the dermis. The dermis is filled with many tiny nerve endings which give you information about the things with which your body comes in contact. They do this by carrying the information to the spinal cord, which sends messages to the brain where the feeling is registered.
 * The Sense of Smell:** Have you ever wondered what you smell when you "smell the roses" in the spring time? What makes a smell is something that is too small to see with your eyeball alone. It is even too small to be seen with a microscope! What you smell are tiny things called odor particles. Millions of them are floating around waiting to be sniffed by your nose!
 * The Sense of Taste:** Have you ever thought about why foods taste different? It's really quite amazing. Your tongue and the roof of your mouth are covered with thousands of tiny taste buds. When you eat something, the saliva in your mouth helps break down your food. This causes the receptor cells located in your tastes buds to send messages through sensory nerves to your brain. Your brain then tells you what flavors you are tasting.
 * The Sense of Hearing:** Like your other sense organs, your ears are extremely well-designed. In fact, they serve two very important purposes. Do you know what they are? You were probably able to figure out that your ears help you to hear sounds, but what you probably did not know is that your ears also help you to keep your balance.

How it works
The nervous system is a network of cells called neurons which transmit information in the form of electrical signals. Neurons are nerve cells that make up the nervous system. Neurons are similar to other cells in the human body in many different ways, but there is one key difference between neurons and other cells. Neurons are specialized to transmit information throughout the body. Your brain has about 100 billion neurons. Neurons communicate with each other at special junctions where chemicals help to bridge the gap between one neuron and the next. There are two temporal lobes in the brain, the left and the right lobe. The right lobe is used in visual memory. The left lobe is used in verbal memory.

How it works with other systems (at least 3 different systems)
One of the systems that the Nervous system works with is the Respiration system. The way that it works with this system is the respiratory system provides oxygen to flow through the blood which keeps us alive.

Disorders of the nervous system
There are many nervous system disorders need clinical help such as Alzheimer's Disease, Brain Tumors, Strokes, Brain Cancer, and more. A less common disorder in the nervous system is tourettes syndrome.