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