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The Nervous System

The Nervous System. What is the nervous system?. Click here to find out!. Nervous System Definition. The nervous system controls and coordinates your body’s activities and helps you sense and respond to changes in your environment.

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The Nervous System

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  1. The Nervous System

  2. What is the nervous system? Click here to find out!

  3. Nervous System Definition • The nervous system controls and coordinates your body’s activities and helps you sense and respond to changes in your environment. • It is made up of your brain, spinal cord, and nerves that run throughout your body. • Your sense organs (eyes, ears, nose, tongue, skin) are also a part of your nervous system.

  4. Your brain and spinal cord make up your Central Nervous System (CNS). • The brain has 3 parts: cerebrum, brain stem, and cerebellum.

  5. Where is the cerebrum located? • Cerebrum

  6. Cerebrum • The cerebrum is the control center of your thoughts and voluntary actions. It is where you experience the sensations of touch, taste, sight, hearing, and smell. • There are two halves, or hemispheres of the cerebrum. The left hemisphere is specialized for language and logical thinking. The right hemisphere is specialized for imagination and creativity, as well as recognizing patterns, such as faces.

  7. Are you left-brain dominant or right-brain dominant? To find out, click here to see which way the cat spins!

  8. Where is the brain stem located? • Brain Stem

  9. The Brain Stem • The brain stem controls vital and continual processes such as breathing, the beating of your heart, and digestion. • The spinal cord is a bundle of nerves that goes from the back of the brain stem down the center of your back. The vertebrae in your backbone protect it. It connects with other nerves outside the CNS. It controls reflexes. • Reflexes are messages that aren’t sent to the brain (for your protection). You can pull your hand away from a hot object much more quickly since the message only goes to the spinal cord and back.

  10. The Cerebellum • The cerebellum helps with balance and coordination.

  11. Neurons are nerve cells! • A typical nerve cell has a central body that contains cytoplasm and a nucleus. • Branching away from this cell body is a long arm known as the axon. • Nerve impulses travel from the axon to the terminal buttons of one nerve cell to the dendrites on the next cell.

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