2. Avian flu virus (gold) inside of bird cells

3. Whole flea

4. Aphid feeding on leaf

5. Bacterial infection attached to cell membrane

6. Eye of a fly

8. Daphnia (water flea)

9. Secretory vesicles coming off of golgi apparatus

10. Protist (unicellular animal) ingesting a bacterium

11. Mitochondria

12. Muscle fibers

13. Tick feeding on skin of dog

14. Bacteria

15. Virus capsids

16. Arteries and blood cells

17. Bacteria

18. Fish gill

19. Lining of dog ureter (tube from bladder to outside)

20. Virus particles

21. Head of a flea

22. Nuclear membrane and associated organelles

23. Stomates under a leaf (cells that allow water in and out of leaf)

24. Pollen from variety of plants

25. Stem of a plant

26. Dust mite found on skin