Invertebrates
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| Invertebrate | A creature lacking a backbone
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| Vertebrate | A creature with a backbone
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| Porifera | The phylum of creatures which includes sponges
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| Cnidaria | The phylum of creatures which includes jellies, anemones, and ocean coral
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| Platyhelminthes | The phylum of creatures which includes flatworms
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| Nematoda | The phylum of creatures which includes roundworms
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| Ectoderm | Means "outer covering" or "outer skin". Refers to outer layer of cells on a sponge
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| Choanocyte | Collar cells lining the inner surface of a sponge. These generate water current by spinning their flagella. They capture food with the sticky collar, then pull the food into their mouth.
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| Spicule | Structure in the body of a sponge; made of carbonate or silicate material. Responsible for the spines found on the surface of some sponges.
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| Collagen | Flexible protein found in tendons and ligaments in humans. Also found in fibers of fibrous (soft) sponges.
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| Demospongia | Class of sponges in phylum Porifera. The bath sponges are members of Demospongia.
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| Calcarea | Class of sponges in phylum Porifera. The "rock" sponges are members of Calcarea.
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| Hexactinellida | Class of sponges in phylum Porifera. The "glass" sponges are members of Hexactinellida.
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| Amebocyte | Motile cell in the body of a sponge. Responsible for carrying food from collar cells to ectoderm cells.
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| Hydrozoa | Class of Cnidarians including hydra and Portugese man O War
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| Scyphozoa | Class of Cnidarians that includes true jellies.
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| Cubozoa | Class of Cnidarians that includes box jellies
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| Anthozoa | Class of Cnidarians that includes corals and anemones
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| Planula | Larvae form of a cnidarian. Has small hairs for swimming until settling to ocean floor.
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| Budding Polyp | Product of asexual reproduction in cnidarians. Identical to parent polyp.
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| Mid-Sagittal | Plane that divides a bilaterally symmetric creature into a right and left half.
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| Frontal | Plane that divides a bilaterally symmetric creature into a dorsal and ventral.
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| Transverse | Plane that divides a bilaterally symmetric creature into a posterior and anterior.
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| Coelem | A hollow interior cavity, surrounded on all sides by mesoderm.
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| Turbellaria | Class of Platyhelminthes which includes planaria and most marine flatworms.
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| Tremetoda | Class of Platyhelminthes which includes flukes.
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| Cestoda | Class of Platyhelminthes which includes tapeworm.
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| Nematocyst | Stinging cell of Cnidarians.
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| Sessile | Stationary. Having a lifestyle of little movement.
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| Bilateral Symmetry | Symmetry with only one plane that divides the creature into two identical halves.
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| Radial Symmetry | Symmetry with multiple planes that divide the creature into two identical halves.
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| Polyp | The sessile form of the Cnidarian life cycle
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| Medusa | The motile form of the Cnidarian life cycle
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| Hermaphrodite | A creature with no specific gender. Generates both male and female gametes.
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| Herbivore | A creature for which plant matter is the exclusive diet.
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| Carnivore | A creature for which animal matter is the exclusive diet.
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| Omnivore | A creature for which both plants and animals form the diet.
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| Chromadorea | Class of Nematoda which includes Pinworms and Hookworms
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| Enoplea | Class of Nematoda which includes Trichinella
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Created by:
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