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Phylum Porifera

Phylum Porifera. by: Chris, Jay, Rachel, Tyler, and Kayla. Aquatic, Terrestrial, or Both?. -The organisms are aquatic. -They are both marine and freshwater. Representative Group of Marine Organisms. The representative group of marine organisms are sponges. . Habitat. -benthic

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Phylum Porifera

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  1. Phylum Porifera by: Chris, Jay, Rachel, Tyler, and Kayla

  2. Aquatic, Terrestrial, or Both? -The organisms are aquatic. -They are both marine and freshwater.

  3. Representative Group of Marine Organisms The representative group of marine organisms are sponges.

  4. Habitat -benthic -live on the bottom of the ocean

  5. Level of Organization -cellular (composed of multiple cells) -different cells perform different functions -little organization

  6. Symmetry -Asymmetrical -irregular shapes

  7. Movement -Sessile -Sponges do not move (same spot forever) -necessities come to them (ex:food)

  8. Feeding -Filter Feeding -Water diffuses through the pores -internal cells filter necessities out of the water.

  9. Feeding

  10. Gas Exchange -body surface -gas diffuses from exterior cells to interior cells. -interior cells absorb Oxygen

  11. Response to Events -generally don’t respond to events in environment -some release toxins for protection -no nervous systems

  12. Circulatory System -no actual circulatory system -Functions as if it were an open system. -can exchange materials with environment -water diffuses into the cells -Oxygen, Carbon Dioxide, other waste diffuses out of the cells into water.

  13. Reproduction -both Asexual and Sexual (can do either) -Asexual-budding-part of sponge pinches off and grows a new sponge on ocean floor. -Sexual-internal-eggs fertilized inside the sponge. -sperm released into water and carried to another sponge

  14. Defining Characteristics -pores -irregular shapes -live attached to seafloor -cannot move -no internal organs (no cell wall) -multicellular -heterotrophic

  15. THE END

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