Superpower of sleep

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Across
  1. 4. – Lack of sleep can increase this feeling of worry or tension (6 letters)
  2. 6. – Getting enough sleep helps keep this organ healthy (5 letters)
  3. 8. – Sleep helps strengthen this system that fights off illness (6 letters)
  4. 10. – When you don’t sleep, you might feel this emotion more easily (7 letters)
  5. 11. – Having a set bedtime ___ can help you fall asleep faster (7 letters)
  6. 12. – Limiting time on this before bed can improve your sleep (6 letters)
  7. 14. – Sleep, eating well, and exercising help you stay this (7 letters)
Down
  1. 1. – What sleep does for your body, like charging a phone battery (8 letters)
  2. 2. – Your brain sorts and stores these during sleep (8 letters)
  3. 3. – Sleep is like a reset button for this part of your body (5 letters)
  4. 5. – How you feel after staying up too late (5 letters)
  5. 7. – The minimum number of hours of sleep middle schoolers should get (4 letters)
  6. 9. – Sleep helps improve this, making you feel happier and less grumpy (4 letters)
  7. 13. – Sleep helps your brain come up with new ideas, improving this skill (10 letters)