Overview of sponge morphology.

1. Figure 33.2 Sponges

12. Figure 33.3 Anatomy of a sponge

14. Sponges are filter feeders:

21. http://www.pbs.org/kcet/shapeoflife/episodes/origins_explo1.html

22. Sponge Spicules

29. Sponge reproduction

30. Sponge reproduction asexual

31. Sponge reproduction asexual sexual

36. Sponges were likely the first true animal on planet Earth.

37. http://www.pbs.org/kcet/shapeoflife/episodes/origins_explo2.html