3. Collar cell
Ostium
Osculum
Spicule ?
Ostium

4. What happens at the osculum?
Water exits

5. True or False?
Amoebocytes digest food for a sponge.
true

6. What does the phylum name “Porifera” mean?
Pore bearing or many pores

7. C B A D
What is B?
Choanocyte or collar cell

8. What is the atrium?
Empty space inside a sponge

9. True or False?
Sponges can reproduce both sexually and asexually.
true

10. A choanocyte is also called a …
Collar cell

11. Collar cell
Ostium
Osculum
Spicule ?
Choanocyte or collar cell

12. What does a collar cell do for a sponge?
Creates water flow, captures food

13. True or False? Sponges obtain their energy through photosynthesis.

14. How do sponges feed?
Filter feeding

15. C B A D
What is A?
osculum

16. How do sponges reproduce?
Sexually or asexually. Sexually by releasing sperm into the water for another sponge to take in and fertilize an egg.

17. True or False?
Sponges were the first animal.
true

18. What do function do spicules have in sponges?
Structural support

19. C B A D
What is C?
ostium

20. What do sponges eat?
Plankton and other organic matter

21. True or False?
Sponges have complex tissues and organs.

22. Which of the following is the class of glass sponges?
A. Hexactinellida
B. Calcarea
C. Demospongiae

23. How do sponges create water flow through their body?

24. ?
Collar cell
Ostium
Osculum
Spicule
Body Wall

25. What is symmetry? Do sponges have it?

26. True or False?
Fertilization of a sponge egg is internal.

27. Where does water enter a sponge?
Ostia or ostium

28. Where does water exit a sponge?
osculum

29. True or False?
When organisms reproduce asexually they create genetically identical offspring.
true

30. What happens at the ostium?
Water enters the sponge

31. C B A D
What is D?
atrium

32. What does the word “sessile” mean?
Doesn’t move as a adult

33. True or False?
Sponges are hermaphroditic.
true

34. What is the empty cavity inside of a sponge called?
atrium

36. Collar cell
Ostium
Osculum
Spicule
spicule ?

37. True or False?
There are no species of sponge that can live in fresh water.
false

38. How do sponges get rid of waste they produce and the oxygen they need?