1. STARFISH DISSECTION

2. Kidspiration by Riedell

3. SYMMETRY ADULTS- Radial LARVA- Bilateral

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

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

6. SPINES
PEDICELLARIA
SKIN GILLS
Image by Riedell

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

8. OSSICLES Calcium carbonate plates
form endoskeleton inside

9. SPINES
PEDICELLARIA
SKIN GILLS
Image by Riedell

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

11. connect to coelom inside
SKIN GILLS Hollow skin tubes that project from skin for increased surface area
connect to coelom inside
Image by Riedell

12. Skin gills between spines
EXCHANGE GASES and
EXCRETE NITROGEN WASTE

13. TUBE FEET surfaces Can exchange gases and excrete nitrogen waste
Can exchange gases and excrete nitrogen waste

14. EYESPOTS
Sense light/dark

15. ORAL VIEW

17. Madreporite Opening to water vascular system

19. WATER VASCULAR SYSTEM
BIODIDAC

21. ORAL VIEW

23. AMBULACRAL GROOVE
TUBE FEET sit in GROOVE

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

25. CUT TRIVIUM

26. DIGESTIVE GLAND
Makes BILE
ABSORBS NUTRIENTS

28. 2 part STOMACH

29. DIGESTIVE SYSTEM ANUS DIGESTIVE DIGESTIVE DIGESTIVE GLANDS GLANDS
MOUTH

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

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

33. WATER VASCULAR SYSTEM
BIODIDAC

34. AMBULACRAL RIDGE
AMPULLAE (tops of tube feet)

35. OSSICLES Calcium carbonate plates
form endoskeleton inside

36. GONADS

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

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

41. DIGESTIVE GLAND
GONAD
OSSICLES

42. MOLLUSKS (some ANNELIDS)
Have a
TROCHOPHORE LARVA

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

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