The Nervous System
Parts of the nervous system
The peripheral nervous system is made out of different parts. The parts are the axon, central nervous system, cortex, nerve, neuron and the optic nerve, now I shall tell you the definitions of these fascinating words.
Axon-the long tail like part of a nerve cell.
Central nervous system- the network of nerves in your body, it is created by the brain and spinal cord.
Cortex- the outer layer of the brain made out of nerve cells.
Nerve-a tiny thread that passes messages between parts of the body and the brain.
Neuron-a nerve cell.
Optic nerve-the main nerve, it is is between your eues and the brain.
What it can control
The nervous system can control many parts. It can control your whole body the main part that you need to know is your movement and the 5 senses.
We move by our mucsles. There are neurons in in side our muscles , the neurons will send a message to each other then we are able to move our legs or arms.
The 5 senses
Our skin has special nerve endings called receptors that sense heat pain or pressure. Our ear records sound waves that enter our eardrum then to a liquid in the spiral tube, tiny hair then changes it to nerve signals. When you look at something light gos into your eye then hit the cell at the back of your eyeball, they then sends a signal along the optic nerve to your brain. You taste by getting signals from cells called taste buds on your tongue. The sense smell of is linked to the sense of taste.