Across
- 4. converts energy from a stimulus
- 5. biochemicals that travel in the bloodstream
- 6. a substance in the body that is “foreign”
- 10. the reproductive organ in females
- 14. the outer layer of the heart wall
- 16. a clear, colorless fluid found in the Central Nervous System
- 19. the interpretation of sensation
- 20. a structure projecting from the face for breathing and smelling
Down
- 1. a pump that keeps the blood moving through the blood vessels
- 2. the functional unit of the nervous system
- 3. connect one neuron to another
- 7. a butterfly shaped organ
- 8. the pale yellow liquid matrix of blood
- 9. cells cell with receptor proteins
- 11. a muscle organ in the mouth that manipulates food
- 12. Cord the major communication link between the brain and the Peripheral Nervous System
- 13. it detects the position of the body parts
- 15. the fluid in the circulatory system
- 17. the largest and the most complex mass in the nerve tissue
- 18. it is the protective proteins produced by th immune system