Across
- 4. passes signals from brain to body
- 6. muscle
- 8. study of living organisms
- 13. Digest
- 14. rate of heatbeat
- 15. give birth
- 16. immunity
- 18. rate of breathing
- 20. building blocks made of fat
Down
- 1. bone structure
- 2. combine molecules to form proteins
- 3. pressure of blood
- 5. a theory made based off limited data
- 7. intensity of heat or cold
- 9. snacks
- 10. breathing
- 11. rotation of blood
- 12. small unit that can live on its own
- 17. sugar
- 19. tissues that perform a function to live