1. Invertebrates

2. Characteristics No backbone/spinal column Multicellular Heterotrophic
Some are symmetrical

3. Phylum Porifera Animals with pores
There are over 50,000 different species
Most live in salt water and few live in freshwater
Have been used for______________________
Sessile: they __________ themselves down and do not move

4. Body plan/structure Primitive and multicellular
Do not have organs, muscles, nerves, mouth, or digestive cavity
Have specialized cells for different functions
Porous body with two types of openings
Water flows in through ________________
Water flows out through________________

5. Skeleton Some sponges are made up of small, hard ____________
Spicules come in different shapes and sizes
Spicules woven together by material called
________
Made of calcium carbonate or silica

6. food Filter feeders-primarily eat plankton
Sponge chambers lined with ____________ (aka collar cells)
Beat ____________to force water through sponge. Water brings in Nutrients and Oxygen, and carries out waste and Carbon Dioxide
2. sticky collars of the collar cells pick up tiny bits of food brought in with the water.

8. Reproduction Asexual Two types
___________________: new sponge grows on parent and falls off to create new animal
2. Regeneration:

9. Reproduction Sexual Eggs and sperm released in water
Most Species hermaphroditic
Eggs and sperm released a different times to ensure __________fertilization

10. Sponges!