1 / 16

Fascinating Fun Facts About Neurons and the Nervous System

Discover intriguing details about neurons, the most specialized cells in animals, including the astonishing lengths of blue whale neurons (up to 30 meters) and girrafes (5 meters). Learn how human neurons range from 1-2 meters, contributing to rapid 1-millisecond response times. Explore the evolution of nervous systems from simple nerve nets in cnidarians to complex centralized systems in vertebrates. Gain insights into the organization of the nervous system in various species, the concept of cephalization, and the distinct roles of the central and peripheral nervous systems.

tana
Download Presentation

Fascinating Fun Facts About Neurons and the Nervous System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nervous system

  2. Fun facts about neurons • Most specialized cell in animals • Longest cell • blue whale neuron • 10-30 meters • giraffe axon • 5 meters • human neuron • 1-2 meters Nervous system allows for 1 millisecond response time

  3. Evolution of: • The simplest animals with nervous systems, the cnidarians, have neurons arranged in nerve nets~ • A nerve net is a series of interconnected nerve cells, these are not specialized at all Nerve net

  4. Evolution of: • All these do is contract and relax the gastrovascular cavity… THAT’S IT!!!~ • A nerve net is a series of interconnected nerve cells, these are not specialized at all Nerve net

  5. So, you mean to tell me… they don’t THINK??!!??!!

  6. Ohhhh, but this net brings purposeful movements

  7. Evolution of: • More complex animals actually have multiple nerve cells bound together • Information flows along a specific route Nerve net

  8. Eyespot Brain Brain Nervecords Simplest CNS Ventralnerve cord Transversenerve Segmentalganglia (c) Planarian (flatworm) (d) Leech (annelid)

  9. Evolution of: • Elongated, bilaterally symmetrical organism are CEPHALIZED • Clustering of neurons at at the front end of the body…

  10. ex. Cephalization: ANNELID

  11. ex. Cephalization: ARTHROPOD

  12. ex. Cephalization: VERTEBRATE

  13. Evolution of: • In vertebrates • The CNS is composed of the brain and spinal cord • The peripheral nervous system (PNS) is composed of nerves and ganglia. Nerve net

  14. Organization of Vertebrate Nervous System The spinal cord conveys information from and to the brain

More Related