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- Sponges - no body symmetry, central cavity
- Cnidarians - jelly (jellyfish), radial symmetry, gastrovascular cavity
- Mollusks - giant clam
- Echinoderms - sea star (starfish), water vascular system, internal skeleton, and spiny body surface
- Flatworms - tapeworm
- Arthropods - the fruit fly, body segments are the hard exoskeleton
- Chordates - homo sapiens, contain tail, nerve cord, notochord, and pharyngeal slits.
What two features define animal phyla?
Animal phyla are categorized in steps with certain criteria, which include the form of coelom, symmetry, body plan, and presence of segmentation. Sponges (Porifera) have a primitive mobile degree of company and lack tissues and symmetry.
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