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Characteristics of invertebrates

Characteristics of invertebrates. Tissue vs no true tissue. Sponges are the only phyla without true tissue. Breakdown of characteristics. Radial symmetry Cnidaria Bilateral symmetry Acoelomates – flatworms and nematodes Psuedocoelomates Nematoda Coelomates

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Characteristics of invertebrates

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  1. Characteristics of invertebrates

  2. Tissue vs no true tissue • Sponges are the only phyla without true tissue

  3. Breakdown of characteristics • Radial symmetry Cnidaria • Bilateral symmetry • Acoelomates – flatworms and nematodes • Psuedocoelomates Nematoda • Coelomates Mollusca, annelids, arthropods • Deutrostomes Echinoderms

  4. Simple nervous system • Exception in cephalization in octopus and squid.

  5. Cold blooded • Body temperature is regulated by the environment they live in.

  6. Multicellular • Where cells are specialized for specific functions.

  7. No cell walls

  8. No internal skeletal structure • Have hydrostatic skeletons, exoskeletons, and mantles.

  9. Reproduction • Most produce sexually and there are asexual stages also.

  10. Heterotrophic • Feed off others • Its animal behavior • http://www.youtube.com/watch?v=wd-QnKlfZHI

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