1. Animal Anatomy & Physiology
Sea Star Dissection

2. Entry Task
Have Out: Dissecting Safely Sea Star Dissection Instructions Prepare for Chordate Presentation

3. Chordate Group Presentation

4. Dissecting Safely Read Along
We will review these items EVERY time we Dissect.
Keep this Handout in your Class Folder / Binder.

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

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

10. 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. AMBULACRAL GROOVE
TUBE FEET sit in GROOVE

15. CUT TRIVIUM

16. DIGESTIVE GLAND
Makes BILE
ABSORBS NUTRIENTS

18. 2 part STOMACH

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

23. GONADS

24. AMBULACRAL RIDGE
AMPULLAE (tops of tube feet)

25. DIGESTIVE GLAND
GONAD
OSSICLES

26. ENDOSKELETON made of OSSICLES

27. HOMEWORK: Review Frog dissection instructions
Highlight important steps
Note questions you have
Watch video of frog dissection