Phylum Porifera

 Sessile: DO NOT MOVE! Stay in one place (rock or shell)  Sponges HAVE NO specialized tissues, organs, or symmetry  Live in shallow seas & some in fresh water

 NONE!  No Tissues (endo, ecto, or meso)  No Organs

 Spongin-  Spongin- A flexible protein  Spicules-  Spicules- Needle-like structures Provide Support

 Filter Feeder: (Heterotroph) porocytes  Bring in small food particles from water through their porocytes (pores) spongocoel choanocytes  Travels through spongocoel (central cavity) where the choanocytes trap & digest food amoebocytes  Then the amoebocytes carry nutrients to cells & take away waste osculum  Then the remaining water leaves through the osculum (opening at top of sponge)

Choanocyte Amoebocyte Sponge Feeding Video

Skip!

 NONE!  Diffusion-  Diffusion- Oxygen from water moves into sponge cells (high to low)

 Asexual-Budding:  Asexual- Budding: Small piece of sponge breaks off from parent & develops into a full grown sponge  Sexual-Hermaphrodites:  Sexual- Hermaphrodites: (Produce egg & sperm at different times) Sperm cells made by one sponge are carried to another sponge by water & once inside the sperm fertilizes the egg; egg develops into a larvae & attaches itself to an object in water where it develops into an adult Sponge Reproduction Video

 Diffusion  Waste leaves through osculum  Diffusion  Waste leaves through osculum  Asymmetry

 Look like balls, discs, vases, branching shrubs, or small trees