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Kingdom Animalia Invertebrates Phylum Porifera Phylum Cnideria

Kingdom Animalia Invertebrates Phylum Porifera Phylum Cnideria. SPONGES. Sponges Phylum Porifera (pore-bearers)/ simplest animal Body Symmetry/Shape: Asymmetrical Segmentation: None Coelom/body cavity: Acoelomates Nervous system: No Cephalization

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Kingdom Animalia Invertebrates Phylum Porifera Phylum Cnideria

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  1. Kingdom Animalia Invertebrates Phylum Porifera Phylum Cnideria

  2. SPONGES

  3. Sponges Phylum Porifera (pore-bearers)/ simplest animal Body Symmetry/Shape: Asymmetrical Segmentation: None Coelom/body cavity: Acoelomates Nervous system: No Cephalization Skeleton/Movement: Sessile, Endoskeleton-Spicules

  4. SPONGES Digestion: filter feeders / many pores .Choanocytes are flagellated cells that pull food in thru ostia (pores) and the amoebocyte cells circulate food around the organism Excretion: diffusion; wastes exit thru osculum Circulation: None Respiration: diffusion-obtain oxygen from water Reproduction: sexual-Hermaphrodites(have sperm & egg)-Both sexes in same organism called monoecious: asexual- bud; Regenerate body parts

  5. Sponge examples &Uses Examples: natural & kitchen sponges Uses: cleaning, bathing, & makeup application

  6. Body structure: A. Osculum: water exits-part of feeding B. Pore cells (ostia): water enters-part of feeding C. Collar cells:(choanocytes)- line interior, have flagella to filter out food from water D. Amoebocytes: carry nutrients from collar cells to body of the sponge E. Spicules- support/skeleton F. Epithelial cells-”skin”-support/protection

  7. Figure 26–8 The Anatomy of a Sponge Section 26-2 Water flow Osculum Choanocyte(collar cells) Central cavity Pores Spicule Pore cell Pore Epidermal cell Archaeocyte

  8. Cnidarians Aurelia Portuguese-man-of-war Sea Aneome Hydras

  9. Phylum Cnidaria- “stinging cell”; predators Germ Layers: 2 Body Symmetry/shape: Radial, 2 body forms: Polyp & Medusa Segmentation: none Coelom: Acoelomate Nervous: Cephalization absent; Nerve Net-conducts impulses Skeleton/Movement: Hydrostatic; nematocyst: stinging cells found on tentacles; sessile or move

  10. Digestion: one body opening for food & wastes Excretion: Circulation: none Respiration: oxygen diffuses into body from water Reproduction: asexual-budding-Polyp form- ex. Hydra sexual-Medusa form- ex. Jellyfish regenerates body parts

  11. Groups & Uses of Cnidarians • 3 Groups of Cnidarians: 1. Hydrozoans: colonies which appear to be one organism Ex: Portuguese-man-of-war 2. Scyphozoans: independent medusa forms Ex: jellyfish, box jelly 3. Anthozoans: colonies of polyps Ex: corals, sea anemone Riches of the sea

  12. Structure:The Polyp and Medusa Stages Tentacles Mesoglea Gastrovascular cavity Mouth/anus Mouth/anus Gastrovascularcavity Tentacles Epidermis Mesoglea Gastroderm Medusa Polyp basal disc: sticky structure at the bottom of polyp ; sessile

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