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Phylum Porifera (sponges) (5)
- No symmetry or consistent body shape
- Water flows through its body, full of canals
- Spicules act as a skeleton to give it structure
- No locomotion; stationary animal
- Specialized cells, but not organized into organs or tissues
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Phylum Cnidaria (cnidarians) (6)
- Firs muscles and nerves
- Some have stinging structures (nematocysts)
- Some free-drifting medusae
- Some non-swimming polyps
- Hollow body cavity for food
- Digestive tract with the entrance being the exit
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Phylum Platyhelminthes (flatworms) (5)
- Some of the simplest animals with bilateral symmetry
- Tubular mouth (pharynx) at mid-body
- three tissue layers, but no body cavity
- Digestive tract with the entrance being the exit
- Most members are parasitic
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Phylum Annelida (annelids) (5)
- Bilateral phylum that added segmentation
- Complete digestive tract with two ends
- fluid-filled compartments used for locomotion
- their active burrowing has affected global climate
- Body design basically a tube within a tube
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Phylum Anthopoda (arthropods) (7)
- Champions of variations in appendages
- Exoskeleton made of chitin and protein
- First phylum to venture into the air
- Pioneered jointed legs
- More species than any other phylum
- Complete digestive tract with two ends
- Bilateral phylum that added segmentatiion
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Phylum Mollusca (molluscs) (6)
- Feeding device like a toothed, rasping tongue (radula)
- Most have a calcium-carbonate shell
- Muscular 'foot' used to slide, dig, or jump
- Some propel, using their siphon as a water jet
- Mantle of tissue covering the body
- Complete digestive tract with two ends
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Phylum Echinodermata (echinoderms) (6)
- Five-part radial symmetry
- Tube feet used for locomotion
- Some spines are little pincers (pedicellaria)
- Hard but flexible bodies with interlocking plates under thin skin
- All members live in the ocean
- Complete digestive tract with two ends
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