FC: The Nervous System | By Kyle Poe, period 6
1: A Brief Introduction | In these few pages, I will explain the basic concept of the nervous system, and how it works. Your body is an amazing thing, and this is the key component. Without your nervous system, you will die in an instant.
2: Your brain consists of three key components: The Cerebrum, the Cerebellum, and the Medulla Oblongata. Your Cerebrum controls all the extraneous functions of your body that are not absolutely nescessary, such as the six senses. (Sight, Hearing, Taste, Touch, Smell, Thought.) Because it does not control nescessary things to live, you can have your cerebrum removed, and not die. You wouldn't be able to think, see, touch or pretty much do anything, though. | The Brain
3: The Cerebellum is located below and behind your Cerebrum, and controls muscle movement in your body. A cool factoid about it is that it is divided into two parts- the left, and the right. The right side controls the left side of your body, and the left controls the right side of your body. | The final major control center in your brain is the Medulla Oblongata. It is the most vital part of your brain, and is located at the very bottom of the brain, and connects directly to the spinal cord. The Medulla Oblongata controls your body's vital functions, such as your heart rate, breathing rate, digestion, and the need to eat.
4: Connecting directly to the medulla oblongata and running down your body is the spinal cord.It runs down your spine, and is protected by many vertebrate. 90% of the body's muscles are controlled by your spinal cord. | The Spinal Cord
5: Making up your spinal cord, your brain, and nerves, are tiny cells called neurons. A single neuron has most of the basic characteristics of a normal cell, but also has dentricles, and an axon. | These cells do not actually touch each other, however. They transmit electrical signals that jump over a space called a synapse to get from place to place. | Neurons
6: Bundles of neurons called nerves run throughout your body, no matter where. This is called the nervous system. Say you touch something. Receptors in your hand will pick that message up, and relay the message to your brain, when you will realize you've touched something. Then your brain sends messages to your muscles in your arm to rub the object. Motor neurons will pick up this message, and make your arm move.
7: To keep your nervous system healthy, you basically keep yourself healthy. Do lots of stimulating activities, stay away from drugs and alcohol, and try to stay away from any hard hits to the head. Always wear your helmet. The amount of neurons that you have now is all you will ever have- so take care of yourself and your body. | Keeping your nervous system healthy