ACROSS
5. virus that infects bacteria
6. not here
8. gaseous substance and chemical messenger
9. leading cause ofdeath
11. do, yesterday
12. database
14. funny teaching tool
19. what Endy builds
21. synthetic biology contest
22. lung,for example
23. made by humans
26. egg's partner
28. smallest blood vessel
29. oxygen lack
30. ambulance destination
31. pickle flavor

DOWN
1. research vet Cynthia
2. roof of the mouth
3. related to the care of animals
4. bronze medal place
5. take in air
7. synthetic biologist Drew
10. save from danger
13. one bacteriophage
15. also
16. breathing machine
17. air organ
18. life-threatening body-wide illness
20. AIDS drug target
21. not actual
24. component ofair
25. dirt-free
27. swimming spot