nervous+system

Nicolas Perez
The Nervous System. It is the control center of all your body. The nervous system is made up of the brain, spinal cord (together they are also know as the central nervous system,) and a system of nerves than are also called the peripheral nervous system. The nervous system is vital and its job is to coordinate all your actions and reactions. This happens when nerve cells or neurons send a message to the brain of pain or whatever and the brain commands the body to do something to react. Most of the nervous system is a web of nerve cells or neurons, this carry messages around your body. When you touch something nerve cells send an electrical pulse to the brain, neurons receive the message by tiny hairs called dendrites. A synapsis is a space between the two neurons when the message gets to this part chemicals called neurotransmitters that carry the message to the next cell. Neurons are all the cells that make up your nervous system. In other words words the nervous system controls all your body and it is vital for living.

This page here explains a little more basic level what I just explained and ti gives a nice example of a person being at school and how he nervous system works. [|click here] to read this page. It is mainly an over view of how the nervous system works.

This image shows very good the neuron cell and were the messages are received

This image as i all ready explained, shows the network of nervs. And I really like this image because it clearly shows how the nervous system is conformed.

This image also helps me a lot because it helps understand the difference between the central and peripheral nervous system, but also because I now get it more clear of were everything goes

There are two types of nerve reactions: Autonomic are when the nervous system does things that we are not constantly thinking or making. Examples fo autonomic things are breathing and heart beat. Somatic nervous system controls voluntary reactions such as writing, and playing a video game. Some messages are pain messages and the spine reacts by pulling away.

This video really shows and explains neurons and also it shows the two different nervous systems, [|click here] to watch it.

Inter Connetion
the nervous and digestive system are stuck together, digestion cant occur if the brain dosent send messages to the body saying it is time to eat and even if we eat the nervous system tells the muscles in the mouth to start chewing and your hand to pick up the fork. The nervous system is really vital and all the systems connect to it because the nervous system commands every single thing in ones body to move a certain way and or even it instructs your lungs to fill with air and your heart to beat. The nervous system is a web that controls everything and it connects to every single muscle, bone in the body.

There are two types fo nerves: sensory nerve cells and motor nerve cells. Sensory nerve cells have short axons and long dendrites, this carry messages from all over the body to the central nervous system. Motor nerve cells are the exact opposite of sensory nerve cells they have long axons, short dendrites and carry messages from the central nervous system to muscles. Tis page explains really the neurons, how they are the purpose they surve and the types of neurons. [|Click here] to watch it further.

My Introduction
The nervous system is an organ system containing a network of specialized cells called neurons that coordinate the actions of an animal and transmit signals between different parts of its body. In the nervous system there are two systems, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain, spinal chord and the retina. The PNS consists of sensory neurons, ganglia, and nerves connecting them to the CNS. They are all interconnected neural pathways. The enteric nervous system is a subsystem of the PNS. Neurons send signals to other cells through electrochemical waves travelling along axons, which are thin fibers. Axons cause chemicals called neurotransmitters to be released at junctions called synapses. A cell that receives a synaptic signal could be excited, inhibited, or modulated. Sensory neurons are turned on by physical motivations intruding on them. They send signals to the CNS to inform about the state of the body and external environment. Motor neurons situated in the CNS or peripheral ganglia, connect the nervous system to muscles or other effector organs. Central neurons make all of their input and outputs connections with other neurons. The interactions of all these types of neurons from neural circuits that generate an organism’s perception of the globe and determine its behavior. The nervous system has also other cells than neurons called glial cells which provide structural and metabolic support. [|Click Here] to watch this amazing webpage about the nervous system, it has great pictures and a great description.

[|Watch this by clicking here] to see this awesome page about the nervous system.

Alzheimer disease
Alzheimer is the most common for of dementia. There is no cure for this disease yet. This disease can lead to death.It is diagnosed in the majority of people that are older than 65 years. Every people can be diagnosed with different symptoms. symptoms can include mental confusion, agression, long term memory loss, irritability, etc. After a time body functions will stop working and it will quickly lead to a death. It can be caused by plaques and tangles in the brain. There are no treatments that can prevent or stop alzheimer disease (AD) also called. [|Click here] to see this amazing webpage about alzheimer, it explains what is it? what are the stages? why it is named like that, etc.

this is the first man who had the disease

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this is a perfect animated video about the nervous system, it shows what the brain controls and also it shows some diseases it could cause.

[[image:1840861.jpg width="243" height="315"]] this pic has new words that we havent learned yet but it shows clearly the CNS.
this is a good image of the Peripheral nervous system.

this is a neuron

this is an image from biodigital human of the nervous system.