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Presentation For Chapter 2 The Brain

This is my presentation on the Brain for Chapter 2. Bio-120

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Presentation For Chapter 2 The Brain

  1. 1. The Human Brain The “ heart ” of the Nervous System By Michal Peters
  2. 2. The Brain <ul><li>“ The brain is center of the nervous system in all vertebrae and most invertebrate animals. In vertebrates, the brain is located in head, protected by the skull and close to the primary sensory apparatus of vision, hearing, balance, taste, and smell.” </li></ul><ul><li>Wikipedia , The free Encyclopedia </li></ul>
  3. 3. Six Main Regions of the Brain <ul><li>Telencephalon – cerebral hemispheres; the largest of the divisions of the human brain, and it is what subserves language </li></ul><ul><li>Diencephalon – thalamus and hypothalamus functions as a relay system between sensory input neurons and other parts of the brain, as an interactive site for the central nervous and endocrine systems; </li></ul><ul><li>Mesencephalon – midbrain; contains nuclei for certain auditory and visual reflexes </li></ul><ul><li>Cerebellum - modulates the outputs of other brain systems to make them more precise </li></ul><ul><li>Pons – relays signals from the cerebrum to the cerebellum and deals primarily with sleep, respiration, swallowing, bladder control, hearing, equilibrium, taste, eye movement, facial expressions, facial sensation, and posture </li></ul><ul><li>Medulla Oblongata – controls a number of autonomic functions, including respiration and blood pressure </li></ul>
  4. 4. Did you know? <ul><li>The brain produces electrical signals which together with chemical reactions allows the parts of the body to communicate. Nerves sends these signals throughout the body. </li></ul><ul><li>The average brain weighs about 3 lbs. At birth the human brain weighs less than a pound. As a child grows, the number of cells remain relatively stable, however the cells grow in size and the number of connections increase. The human brain reaches its full size at approximately 6 years of age . </li></ul><ul><li>The brain is only 2% of the body's weight, however, it uses 20% of the oxygen supply and gets 20% of the blood flow. Blood vessels (arteries, capillaries, and veins) supply the brain with oxygen and nourishment, and take away wastes. If brain cells do not get oxygen for 3 to 5 minutes, they begin to die. </li></ul>
  5. 5. The Nervous System <ul><li>The nervous system controls our lives and all of our </li></ul><ul><li>body functions. Every action and every response to </li></ul><ul><li>anything is coordinated by the nervous system, be it </li></ul><ul><li>physical, mental or emotional. </li></ul>
  6. 6. Parts of the Nervous System <ul><li>The Central Nervous System – consists of the brain and the spinal cord </li></ul><ul><li>The Peripheral Nervous System – consists of all the neural tissue that lies outside the central nervous system </li></ul><ul><li>Autonomic Nervous System – mainly deals with involuntary responses; it can sometimes act independently from the brain without receiving information from it. </li></ul><ul><ul><ul><li>The Sympathetic Division (fight or flight) </li></ul></ul></ul><ul><ul><ul><li>The Parasympathetic Division (time to rest) </li></ul></ul></ul>
  7. 7. Maintaining a Healthy Brain <ul><li>Exercise Regularly </li></ul><ul><li>Get adequate sleep </li></ul><ul><li>Eat a balanced diet </li></ul><ul><li>Keep your mind exercised </li></ul><ul><li>Stay socially engaged </li></ul><ul><li>Manage Stress </li></ul><ul><li>Get regular medical check-ups </li></ul><ul><li>Do not drink or smoke in excess </li></ul><ul><li>Do not use illegal drugs </li></ul>

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