Porifera

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Porifera Cnidaria
Sponges, Hydra, Medusa
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Porifera/Sponges

• Filter food using collar cells
• Spongin skeleton
• Spicules body of sponge
• Sexual reproduction larvae stage
• Asexual reproduction budding, regenerate
• Sessile stay in one place

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Cnidarians

• stinging cells
• 2 shapes (polyp medusa)
• Nematocysts stinging cells on tentacles
• Secrete calcium carbonate shells

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Medusa

• Jelly fish
• Bell shape
• Free-swimming

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Polyp

• Hydra
• Sessile
• Shaped like a vase

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Importance of Coral Reefs

• Diversity of life
• Protect beaches and shorelines
• Fossils help scientists find oil deposits
• Medicines to fight cancer
• Replace missing bone fragments in humans