1. Invertebrate Photos

2. Acoelomate
flatworm
Pseudocoelomate
roundworm
Coelomate
Leech

3. Tapeworm Scolex (head) with suckers and hooks

4. Tapeworm Segments (proglottids)

5. Tapeworm
Uterine branches in proglottid

7. Tapeworms inside intestines

8. Class Trematoda - Flukes
Clonorchis sinensis - liver fluke
Oral sucker
Pharynx
Intestines (cecum)
Uterus
Testes

9. Clonorchis sinensis -liver fluke

10. Fasciolopsis buski giant intestinal fluke

11. Blood Fluke Schistosoma
Male
Female

12. Blood Fluke: Schistosomiais

13. Blood Fluke Schistosoma Swimmer’s Itch

14. Planaria

15. Pinworm
Female

16. Pinworm adult
Mouth
Pharynx
Eggs

17. Pinworm

18. Phylum Nematoda roundworms
Ascaris lumbricoides - intestinal round worm- (plastimount)
Male
Female

19. Ascariasis

20. Male hookworm

21. Hookworm teeth
Necator americanus

22. Posterior bursa and rays of Male Hookworm
Function is for copulation

23. Dog and Cat Hookworms: Cutaneous Larva Migrans
This is when a dog or cat hookworm gets into a human by accident. Since we are not the right kind of host, the worm dies under the skin and causes an allergic reaction.

24. Phylum Nematoda roundworms
Trichinella spiralis- threadworm encysted in muscle
Cyst
Muscle
Larva

25. Trichinella cyst

26. Trichinella cysts
Muscle
Larvae
Cyst

27. Leech

28. Dermacentor spp.- tick Head Thorax Abdomen Legs
Class Arachnia

30. Sarcoptes scabiei - itch mite Mouth Legs Bristles on rear legs Bristles on abdomen
Class Arachnia

31. Dermatophagoides spp.- dust mite
Thorax
Legs
Abdomen
Class Arachnia

32. Class Insecta
Flea Head Thorax Abdomen Legs

33. Class Insecta
Pediculus humanis corporus - human body louse Abdomen Thorax Head Antennae (for feeling) Eyes Plates (protection) Legs

34. Human Body Louse

35. Crab Louse