- published: 23 Feb 2015
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The nervous system is the part of an animal's body that coordinates its voluntary and involuntary actions and transmits signals to and from different parts of its body. Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. In vertebrate species it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body. Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent. Most nerves serve both functions and are called mixed nerves. The PNS is divided into a) somatic and b) autonomic nervous system, and c) the enteric nervous system. Somatic nerves mediate voluntary movement. The autonomic nervous system is further subdivided into the sympathetic and the parasympathetic nervous systems. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The enteric nervous system functions to control the gastrointestinal system. Both autonomic and enteric nervous systems function involuntarily. Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves.
•••SUBBABLE MESSAGE••• TO: Kerry FROM: Cale I love you with all my ha-art. Deadset. *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. *** Today Hank kicks off our look around MISSION CONTROL: your nervous system. -- Table of Contents: Sensory Input, Integration and Motor Output 1:36 Organization of Central and Peripheral Systems 2:16 Glial Cells 3:54 Role, Anatomy and Function of Neuron Types 5:23 Structure and Function of Neurons 6:20 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter....
Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-3a36 Support CrashCourse on Subbable: http://subbable.com/crashcourse
This video introduces us to the Central Nervous System. This is a product of Mexus Education Pvt. Ltd., an education innovations company based in Mumbai, India. http://www.mexuseducation.com, http://www.ikenstore.in
041 - Animal Nervous System Paul Andersen begins this podcast with a discussion of brain lateralization and gives a brief demonstration of tests that were performed on split-brain individuals. He then discusses the major parts of a neuron and explains how action potentials are generated using voltage-gated ion channels. He explains how neurotransmitters transmit messages across a synapse and how these messages can be either inhibitory or excitatory. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License All of the images are licensed under creative commons and publ...
Introduction to the structure of the human nervous system. More free lessons at: http://www.khanacademy.org/video?v=jmD0LBdAvlE Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.
Breath taking HD video with powerful music to introduce students - Human Nervous System. You can use this video as a class opener. Students will get attracted to the lesson by own.
Today Hank talks about your central nervous system. In this episode we'll explore how your brain develops and how important location is for each of your brain's many functions. Table of Contents Central Nervous System, Location and Brain Function 1:48 Brain Development 3:21 Neural Tube 3:27 Three Primary Vesicles 3:37 Four Adult Structures and Their Basic Functions 4:17 *** Crash Course is now on Patreon! You can support us directly (and, until April 30th, have your contributions matched by Patreon!) by signing up at http://www.patreon.com/crashcourse ***SUBBABLE MESSAGES*** TO: Clay Compton FROM: Bill Compton Happy birthday, Dad! -- TO: My Psychology Students FROM: Dr. Caitlin Faas Any observant eyes catching this message? We love Crash Course! ***SUPPORTER THANK YOU!*** Thank ...
Here's a quick video on how the human nervous system works. It is animated and explains it all. This includes the Centeral Nervous System (CNS) & the the Peripheral Nervous System (PNS). The CNS includes the spinal-cord and mind. The PNS consists primarily of nerves, which are extended fibers that link the CNS to each other area of the human anatomy. In the cellular-level, the stressed system is described by the existence of a special kind of cell, named the neuron, also referred to as a "nerve mobile". Neurons have unique constructions that let them send signs quickly and just to other cells. They deliver these signs in the kind of electrochemical waves touring along slender fibers called axons, which trigger chemicals called neuro-transmitters to be discharged at junctions called synaps...
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The Nervous System: The Master System Everything is coltrolled by the nervous system. Every gland, every organ every single cell in our body does what the nervous system tells it to do. Shouldn't you focus on keeping your nervous system as healthy as possible? Doesn't it deserve more concern than your teeth? Yes, your teeth are important but they don't control the actions of your entire body! At http://bergmanchiropractic.com and http://Owners-Guide.com we strive to educate people on natural solutions to health. http://www.theArthritisReversalSystem.com is my online video course with 21 videos, 3 manuals and an online forum! http://SkypePackage.com for online consults. SUBSCRIBE at http://www.youtube.com/user/johnbchiro CALL TOLL FREE 1-855-712-0012 to get bonus materials not on YouTub...
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Anatomy & Physiology Chapter 11 Part A : Fundamentals of the Nervous System and Nervous Tissue Lecture For the CNS vs. PNS alternate flow chart please click here: https://youtu.be/ll1Su6MSync Please leave questions in the comments below or email directly at fmajoo@gmail.com Text: Elaine Marieb & Katja Hoehn Human Anatomy and Physiology 10th edition. Pearson Education Inc 2016. The Human Body: An Orientation. Topics covered: Functions of the Nervous System Sensory Input Integration Motor output effector organs Central Nervous System CNS Peripheral Nervous System PNS Spinal Nerves Cranial Nerves Sensory division Afferent division Somatic Sensory Fibers Visceral Sensory Fibers Motor Division Efferent division Efferent Motor Neurons Sensory Afferent Neurons Somatic Nervous System Autonom...
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The Human Body in Health & Disease, Thibodeau. Chapter 9 Vodcast MCO 150: Medical Specialties & Pathophysiology Central Maine Community College Taught by: Sarah Varney, RN, BSN, CCRN
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Please watch: "LEARN HEART SOUNDS IN 20 MINUTES!!!" https://www.youtube.com/watch?v=NrdZhCXtc7Q -~-~~-~~~-~~-~- This lecture is about understanding autonomic nervous system physiology including sympathetic and parasympathetic pathways. Watch more videos on other lectures - www.smashusmle.com www.ftplectures.com