9 Phyla of the Animal Kingdom

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9 Phylaof the Animal Kingdom

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Common Animal Characteristics

• Multicellular (many cells)
• Eukaryotic (cells contain nucleus)
• Heterotrophic (must eat)
• Lack cell walls
• Move

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Animal Phyla

• 34 total phyla in the kingdom
• Classifying criteria
• Body symmetry
• Level of organization

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Types of body symmetry

• Asymmetry
• No symmetry
• Radial symmetry
• Circular shape
• Bilateral symmetry
• Identical right left halves

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Levels of Organization

• Cellular
• Simplest animals are made of independent cells
• Ex Sponges

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Levels of Organization

• Tissue
• Cells work together to form specialized tissues
  like muscle tissue
• Ex Jellyfish

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Levels of Organization

• Organs
• Tissues work together to form organs that do a
  specific job
• Ex Turtles have lungs.

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Phylum Porifera

• Found only in water
• Saclike bodies with many pores for feeding
• Simplest phylum
• Asymmetrical
• Organized into Cells
• EX Sponges

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Phylum Cnidaria

• Have stinging tentacles
• Radially symmetrical
• Organized into tissues
• Ex Sea anemones

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Phylum Platyhelminthes

• Mostly parasitic
• Bilaterally symmetrical
• Complex tissues nerves and brain
• Ex Flatworms Tapeworms

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Phylum Nematoda

• Bilateral Symmetrical
• Organized into Tissues
• Ex Round worms Hook worms Pinworms

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Phylum Mollusca

• Soft body, occasional hard shell
• Simple organ systems
• Ex Clams

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Phylum Annelida

• Segmented body (divided sections) worms
• Ex Earthworms

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Phylum Arthropoda

• Have jointed appendages
• Have an exoskeleton molt
• Biggest phlum
• Ex ALL insects

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Phylum Echinodermata

• Spiny skin
• Radially symmetrical
• Well developed organs
• Can regenerate
• Ex Starfish

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Phylum Chordata

• Most advanced animals
• Internal skeleton and spinal cord
• Bilaterally symmetrical
• Example
• Fish (bony and cartilage)
• Amphibians
• Reptiles
• Mammals
• Birds
• All reproduce sexually