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Kingdom Animalia : Porifera & Cnidaria

Kingdom Animalia : Porifera & Cnidaria. Unit 6 – Lecture 7. Kingdom Animalia. Animals Are: eukaryotic multicellular sexually reproducing mostly some have asexual reproduction. Kingdom Animalia. Animals Have: have no cell wall have specalized cells. Kingdom Animalia. Animals Have:

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Kingdom Animalia : Porifera & Cnidaria

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  1. Kingdom Animalia:Porifera & Cnidaria Unit 6 – Lecture 7

  2. Kingdom Animalia • Animals Are: • eukaryotic • multicellular • sexually reproducing mostly • some have asexual reproduction

  3. Kingdom Animalia • Animals Have: • have no cell wall • have specalized cells

  4. Kingdom Animalia • Animals Have: • most have tissues • tissue – groups of specilized cells that work together as a single unit. • examples: heart, lung, skin…etc • organs are made of tissues

  5. Symmetry • Asymmetry • non-symmetrical • most are sessile • sessile – non-moving • ex: sponges

  6. Symmetry • Radial Symmetry • symmetrical from the center out • develops from • 2 layers of cells • 2 OR 3 layers of tissues • ex: starfish, jellyfish, etc.

  7. Symmetry • Bilateral Symmetry • bi = two, lateral = refers to side • symmetrical along a median line • develops from 3 layers of tissues • ex: most commonly chordates

  8. Phylum Porifera • ex: sponges, aka pore-bearers • asymmetrical [or radial] – sessile • 2 layers of cells – no tissues • no body cavity

  9. Phylum Porifera • get nutrients thorugh filter feeding

  10. Phylum Porifera • reproduces • sexually with gametes • asexually using gemmules [like budding] • asexually using fragmentation • respires through diffusion

  11. Phylum Cnidaria • jellyfish, hydras, anemone, coral…etc • aka stinging-celled organisms • Cnidarians Have: • radial symmetry • 2 layers of tissues • simple nervous system • senses chemical “smells” & touch

  12. Phylum Cnidaria • Cnidarians Have: • 2 body forms

  13. Phylum Cnidaria • ingestion using tentacles • nematocysts – small, harpoon-like stinging cells inside of cnidocytes

  14. Phylum Cnidaria • Cnidarians Have: • digestion using gastrovascular cavity • gastro = stomach • gastrovascular cavity – singular cavity which includes digestion and respiration

  15. Phylum Cnidaria • reproduce • sexually with gametes • asexually using budding • immortal jellyfish?? • respires using diffusion

  16. HW: • Finish Porifera/Cnidaria pages for tomorrow • read the Cnidaria worksheet

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