"Why do we dream?" Review

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Across
  1. 1. a short sleep, especially during the day.
  2. 2. one whose position is hereditary and who rules for life
  3. 3. a series of thoughts, images, and sensations occurring in a person's mind during sleep
  4. 4. something remembered from the past; a recollection.
  5. 7. become sound or healthy again.
  6. 8. an organ of soft nervous tissue contained in the skull of vertebrates, functioning as the coordinating center of sensation and intellectual and nervous activity.
  7. 9. a desire or hope for something to happen.
Down
  1. 1. a frightening or unpleasant dream.
  2. 5. practice something for a performance or for a specific moment
  3. 6. physical suffering or discomfort caused by illness or injury.