1. Sponges

2. Classification: Domain Eukarya Kingdom Animalia Phylum Porifiera – due to its pores * More than 7,000 named species *The rest of a sponge’s classification depends upon its characteristics.

3. Characteristics Full of pores Most have no symmetry Have NO digestive, circulatory or nervous system Primitive skeleton (spicules) Most live in salt water

4. Morphology 1 st level of cellular organization (No Tissue) 3 types of cells Collar cells Move water through sponge and trap food Amoeboid cells Carry food and waste to and from other cells Out cells Epidermis – outer skin

5. Eating Filter feed – mainly on bacteria Collar cells create currents Water comes in pores and out osculum Food is trapped by collar cells and picked up by amoeboid cells

6. Reproduction Sexually Hermaphroditic – both male and female Each sponge acts as only one gender though it has both reproductive systems Produce egg and sperm Sperm fertilizes eggs inside a “female” sponge Asexually Budding (cloning) Regeneration

7. Types of Sponges Barrel Sponge Tube Sponge

8. Movement Move only as a larva Adults don’t move

9. Uses Bathing Cleaning Absorbing water Surgical Pharmaceutical