Across
- 3. An old/poetic world to say sleep
- 5. Sleep helps to find these
- 7. … of the brain
- 10. Chemical substances that transmit messages between neurons
- 11. Verb bases on real action
- 12. Involuntary action performed by the brain
- 13. Type of hormones
- 15. A part of the brain
Down
- 1. The science of the nervous system
- 2. Sleep hormones secreted by the brain
- 4. Term that Margaret Thatcher uses to criticize weakness
- 6. Main source of energy for the brain
- 8. Natural biological cycle of the body which lasts 24 hours
- 9. When in another country is 12 AM and here is 12PM
- 14. ...is improved by sleep