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The Nervous System By: Stefanie Garcia, and Jay Patel By PresenterMedia.com •Agenda 1/17/13-1/18/13 Learning The Nervous System with this Informational Powerpoint Item 1 Classwork: Who Wants to be a Millionaire Item 2 Winning Group Does Not Have To Complete Homework! Going Over the Homework: word search Item 3 Item 4 “Ticket Out The Door” E.Q: What is the purpose of the Nervous System? Standard: S7L2e: Explain the purpose of the major organ system in the human body •The Nervous System Overview The nervous system consist of three main parts; the brain, the spinal cord, and neurons • Inside the brain and the spinal cord are Neurons. Neurons are a specialized cell transmitting nerve impulses. • It controls all the other systems in our body! • There are a couple of threats that can happen if you have medical problems or serious impacts to the body • There are millions of nerve cells in the human body. This number goes beyond the number of stars in the Milky Way If all of the neurons in your body were to be lined up, it would form a 600 mile long line At any time, only four percent of the cells in the brain are active, the rest are kept in reserve •Comparison NERVOUS SYSTEM • CIRCULATORY SYSTEM The Nervous System sends, receives, and processes nerve impulses throughout the body. When we grow older the brain loses a gram each year • The Circulatory System can be mixed up with the Nervous System. But, there is a difference. The Circulatory System distributes blood. Neurons have the ability of transmitting impulses at the speed of 100 meters per second. The speed of message transmission to the brain can be as high as 180 miles per hour Neurons are the largest cell in your body! •Purpose/Functions • The nervous system of the human being is responsible for sending, receiving, and processing nerve impulses throughout the body. All the organs and muscles inside your body rely upon these nerve impulses to function. It could be considered as the master control unit inside your body. Sense organs provide the nervous system with information about the environment by means of such senses as sight, hearing, smell, taste, tough, pressure, and pain. Nerves are connected throughout the whole body to the brain. They carry the information throughout the body in the form of electrochemical signals called impulses. These impulses travel from the brain and spinal cord to the nerves located throughout the body. It controls all the other systems in your body, receives information about your environment and sends it to your brain to stores memories, and allows you to think and control muscle movement •Threats/Issues • • Paralysis is a problem, it is when nerves are damaged and the brain can’t send signals telling what part of the body is paralyzed so that part of the body doesn’t work Meningitis is a bacterial infection that covers the spinal cord and the brain. When you have meningitis it effects ability to think and learn. It also can cause hearing loss Most issues involve loss of movement (paralysis), and brain and spinal cord damage/dysfunctions. (meningitis) The issues can be VERY serious. Many times fatal! In most cases it is paralysis •Three Main Parts of the Nervous System The Brain • Neurons • • • • • The brain helps the body respond to brain is the body’s main information Most Neurons are made of three parts center. When you think neurons are Dendrites, axons, and, myelin. parts. 1.) Cerebrum which controls Dendrites are threadlike branches coming out of the cell body vision, touch, and other senses. It Axons are the end of the branches Myelin is a substance sometimes rapped around a axon The Spinal Cord information detected by senses. The working. The brain has three main also handles movements you have control over. Thinking takes place in cerebrum. 2.) Cerebellum takes control of balance and coordination. 3.) The brain stem is the link to the spinal cord and it also controls digestion, breathing, and heartbeat. • The spinal cord is a tube of neurons that runs up the spine and attaches to the brain stem. Information from nerves that branch out to the rest of the body goes to the spinal cord. Some messages are processed by the spinal cord but most information is sent on to the brain •Location • • • • The location of the nervous system is across your entire body! Nerves are everywhere! The central nervous system is located at the brain and spinal cord The peripheral nervous system is located where the nerves branch to all the muscles and organs. The peripheral nervous system also includes and includes the 12 cranial nerves and 31 spinal nerves that exit the central nervous system •How to keep the Nervous System Healthy The nervous system is such an important part of your body. You want it to work at its best so that you can be at your best! There are a few things that you can do to give your nervous system everything that it needs. First, drink plenty of water. Your brain is eighty-five percent water. If you don't drink enough water, your brain won't work as well as it could. It is also important to eat healthy foods. Your brain needs minerals like calcium and potassium that can be found in milk and many fruits and vegetables. Your brain also needs healthy fats like those in nuts and fish. These fats help build new connections between nerves and brain cells. These fats may improve memory and increase learning and intelligence. Drink Lots of Water! Eat Foods With the “Good Kind of Fat” Eat Healthy Foods Find Food With lots of Minerals •Two Parts Of The Nervous System Central and Peripheral Nervous System • • • The two part of the Nervous System are the Peripheral and Central Nervous System The Central Nervous System involves the Brain and the Spinal Cord. It sends the signals. The Peripheral Nervous System involves the Nerves. It receives the signals that the Brain sends. It also moves the body parts that the brain tells it. •The Two Different Nerves Sensory Nerves and Motor Nerves • There are two different types of nerves. Sensory and Motor Nerves • Sensory Nerves pick up signals from the body and tells the brain what kind of movement is needed • Motor Nerves tell the muscles how to move. Your brain tells them what to move and how to move it •Summary Your nervous system contains what is probably the most important part of your body: your brain. Your brain allows you to learn. It allows you to feel emotions like love, anger, and sadness. Your brain gives you the ability to see, hear, taste, touch, and smell. It works together with the nerves and spinal cord to send the signals that make your body move. Your nervous system lets you do things like running, jumping, and dancing. Citations • http://hes.ucfsd.org/gclaypo/nervoussys.html : No Copyright Info • • • • • • • http://www.becomehealthynow.com/article /bodynervousadvanced/826: Copyright and disclaimer 2000-2010 http://wiki.answers.com/Q/What_is_the_purp ose_of_the_nervous_system_in_your_body: Copyright © 2012 Answers Corporation http://www.newsmedical.net/health/Function-of-the-NervousSystem.aspx:By Dr Ananya Mandal, MD http://answers.yahoo.com/question/index?qi d=20090321134447AAh6YU9:Copyright © 2013 Yahoo! Inc. All Rights Reserved http://answers.yahoo.com/question/index?qi d=20090321134447AAh6YU9:Copyright © 2013 Yahoo! Inc. All Rights Reserved Book: Uncover The Human Body: By: Luann Colombo: Copyright: becker&mayer!, 2002