CH3: Animal Classification (LAB ACT)

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From Lab Activity 3

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12 Terms

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Phylum

A major taxonomic category in the animal kingdom, distinguished by structural and functional characteristics.

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Acoelomate

Animals that lack a body cavity.

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Coelomate

Animals that possess a true body cavity.

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Phylum Porifera

A phylum characterized by asymmetrical bodies, thousands of pores, and a central cavity for filter feeding.

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Phylum Cnidaria

A phylum with radially symmetrical bodies, diploblastic tissue organization, and specialized cells called cnidocytes.

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Phylum Platyhelminthes

A phylum of triploblastic, acoelomate, bilaterally symmetrical animals, which may be free-living or parasitic.

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Phylum Nematoda

A phylum of roundworms that are triploblastic, bilateral, unsegmented, and have a complete digestive tract.

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Phylum Mollusca

A diverse phylum with a complete digestive tract, soft muscular foot, and a visceral hump, often protected by a shell.

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Phylum Annelida

A phylum characterized by segmentation, metamerism, and the presence of chaetae in most members.

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Phylum Arthropoda

The most diverse animal phylum, known for jointed appendages, chitinous exoskeletons, and segmentation without septa.

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Phylum Echinodermata

A phylum of deuterostomic animals with radial symmetry, internal skeletons made of ossicles, and slow-moving adults.

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Phylum Chordata

A phylum that includes vertebrates and invertebrates with a notochord, including tunicates and lancelets.