Across
- 3. Organism’s reaction to a stimulus
- 4. Part of the brain that controls conscious thoughts,sense, language, memories
- 5. Column of bones that protects the spinal cord and supports the body
- 7. Network of vessels that carries a clear fluid fluid; helps ward off infections, germs and diseases
- 11. Movement; something that happens
- 12. To act because of something that happened
- 13. Basic unit of all living things
- 14. Cell of the nervous system that carries signals to the body from the brain
- 15. In an experiment, a group that is kept under normal conditions while others change
- 18. System that brings oxygen into the body and releases carbon dioxide
- 20. Body system that breaks down food into tiny pieces so that body uses for energy
- 22. System that transports blood and other fluids throughout the body
- 24. Part of the brain that controls balance, coordination, and unconscious muscle activities
- 25. Any part of the nervous system that works without a person’s having to think about it
Down
- 1. An automatic response
- 2. Kind of action or activity specific to a thing or person
- 6. System of the body that provides protection from infection and disease
- 8. Body system responsible for storing and getting rid of waste
- 9. System that delivers blood to different parts of a body
- 10. System of the body that carries information to all parts of the body
- 16. System of glands in the body that secrete hormones
- 17. Main control center in an animal body
- 19. Bundle of nerves that runs along the back of a vertebrate
- 21. Group of related objects that work together to perform a function
- 23. Nerve cell