1. STARFISH DISSECTION

3. SYMMETRY
ADULTS- Radial
LARVA- Bilateral

4. INVERTEBRATES (No backbone)
ALL INVERTEBRATES ARE PROTOSTOMES EXCEPT
ECHINODERMS
INVERTEBRATES
DEUTEROSTOMES

5. STARFISH LATIN meaning ANIMALIA ASTEROIDEA “star-like”
KINGDOM _____________
PHYLUM _____________________________
CLASS _______________________________
ANIMALIA
ECHINODERMATA “spiny skin”
ASTEROIDEA “star-like”

6. SPINES
PEDICELLARIA
SKIN GILLS

7. SPINY SKIN SPINES for protection connect to
ENDOSKELETON underneath skin

8. PEDICELLARIAE (sing. Pedicellaria)
Keep surface clear of organisms

9. SKIN GILLS Hollow skin tubes that project from skin for increased surface area
EXCHANGE GASES and
EXCRETE NITROGEN WASTE

10. EYESPOTS

11. ORAL VIEW

13. Madreporite

15. WATER VASCULAR SYSTEM

17. ORAL VIEW

19. AMBULACRAL GROOVE

20. TUBE FEET Used for feeding & locomotion
Can exchange gases and excrete nitrogen waste

21. CUT TRIVIUM

22. DIGESTIVE GLAND
Makes BILE
ABSORBS NUTRIENTS

24. 2 part STOMACH

25. DIGESTIVE SYSTEM ANUS DIGESTIVE DIGESTIVE DIGESTIVE GLANDS GLANDS
MOUTH

26. CARDIAC stomach connects to mouth (extruded during feeding)
PYLORIC stomach connects to digestive glands and ANUS

28. AMBULACRAL RIDGE covered by OSSICLES
contains RADIAL NERVE (nervous)
RADIAL CANAL (water vascular system)

29. WATER VASCULAR SYSTEM

30. AMBULACRAL RIDGE
AMPULLAE (tops of tube feet)

31. GONADS

33. NERVOUS SYSTEM NERVE RING encircles mouth RADIAL NERVES run inside
AMBULACRAL RIDGE in each arm

34. SEPARATE SEXES GONADS- reproductive organs
Starfish have both SEXUAL ASEXUAL (Regeneration)

35. DIGESTIVE GLAND
GONAD
OSSICLES

36. MOLLUSKS (some ANNELIDS)
Have a
TROCHOPHORE LARVA

37. SEXUAL REPRODUCTION INDIRECT LARVA BIPINNARIA EXTERNAL FERTILIZATION
DEVELOPMENT
INDIRECT
LARVA
BIPINNARIA
Has BILATERAL SYMMETRY and wings to swim

38. Ability to self amputate AUTOTOMY
ASEXUAL REPRODUCTION
Ability to self amputate
AUTOTOMY
Ability to regrow lost parts
REGENERATION