Across
- 1. chemical messages passed along a synapse
- 3. chemical used to test for starch
- 5. a gap between two neurones
- 6. they break down dead organisms
- 10. 1% of the blood
- 11. where bile is produced
- 12. what insulin converts glucose into
- 17. performs reaction to a stimulus
- 18. a parasitic pathogen
- 20. blood vessels getting bigger when the body is too hot
- 21. enzyme produced by the salivary glands
- 22. a group of the same species of animals in an ecosystem
- 23. chemical that absorbs sunlight
- 25. a harmful chemical produced during anaerobic respiration in animals
- 26. a white blood cell engulfing a pathogen
- 28. what produces insulin?
Down
- 2. the movement of sugars through the plant
- 4. a system for the release of hormones
- 7. clots blood
- 8. prevents backflow in a vein
- 9. hormone released when there is a decrease in glucose in the body
- 13. the heart's biggest artery, on its left ventricle
- 14. blood on the left side of the heart
- 15. part of the cell that produces proteins
- 16. ___ arteries supply oxygen to the heart
- 17. chemical produced during anaerobic respiration in plants
- 18. keyword for veins and arteries meaning 'lungs'
- 19. where all chemical reactions in a cell takes place
- 24. muscle that sends electric current to the heart
- 27. foreign substance on the cell wall of a pathogen