1. Squid Dissection

2. Siphon/Funnel Squid draws water into mantle cavity through the collar
Water is forced back out the siphon
The squid moves by water-jet
propulsion

3. Siphon/Funnel

4. Siphon Retractor Muscles
Used to change the orientation of the siphon, resulting in a change in direction of the jet of water exiting the siphon
Aids in swimming direction

5. Siphon Retractor Muscles

6. Anterior Vena Cava Vein
Brings un-oxygenated blood back from the head to the branchial hearts

7. Anterior Vena Cava (Vein)

8. Ink Sac
Silvery structure attached to the rectum
Filled with a pigment that can be ejected into the water when the squid is disturbed

9. Ink Sac
Anus

10. Anus Release waste & ink
Connected to the ink sac is the rectum, with the anus at the end
Release waste & ink

11. Ink Sac
Anus

12. Gills
2 Respiratory organs
Oxygenates blood, removes carbon dioxide

13. Gill

14. Branchial Hearts
Pumps oxygen-poor blood to
gills

15. Branchial Heart

16. Systemic Heart Found under branchial hearts, between 2 gills
Pumps oxygen-rich blood back to the body/head

17. Systemic
Heart

18. Caecum Can expand greatly to hold food/nutrients
Absorbs nutrients for the body

19. Caecum

20. Under-Side
Cecum

21. Pen Functions as the skeleton Provides support for the mantle
Provides a place for organ attachment

22. Pen

23. Pen:
Pulled out

24. The End