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11 Cards in this Set

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Structural features:
Porifera
- No special shape
- Lack tissues & organs
- Collection of cells of different types organised into pores, canals & chambers
Structural features:
Cnidaria
- 2 cell layers
- Radial symmetry
- 2 forms - medusa & polyp
- Tentacles with stinging cells (nematoblasts)
Structural features:
Platyhelminthes
- Flat & unsegmented
- Bilaterally symmetric
- Rudimentary head
- Mouth but no anus
Structural features:
Annelida
- Segmented body
- Bilaterally symmetric
- Bristles (chaetae)
- Mouth & anus
Structural features:
Mollusca
- Soft, flexible body with no obvious segmentation
- Head, muscular foot & visceral hump
- Many with a single/double shell
Structural features:
Arthropoda
- Segmented
- Bilaterally symmetric
- Hard, chitinous exoskeleton
- Jointed appendages
Examples:
Porifera
Sponges
Examples:
Cnidaria
- Jellyfish
- Sea anemones
Examples:
Platyhelminthes
Flatworms
Examples:
Annelida
Segmented worms
Examples:
Mollusca
- Snails
- Slugs
- Squids