Invertebrates

Characteristics No backbone/spinal column Multicellular Heterotrophic Some are symmetrical

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

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________________

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

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.

Reproduction Asexual Two types ___________________: new sponge grows on parent and falls off to create new animal https://www.youtube.com/watch?v=4JIytOL-Q18 2. Regeneration: https://www.youtube.com/watch?v=IEi7D5yF1QU

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

Sponges! https://www.youtube.com/watch?time_continue=273&v=m8a0oNsDEx8