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Invertebrate Animals

Invertebrate Animals. Chapter 6 Section 1. What is an animal?. Many-celled organisms that are made of different kinds of cells Most have nucleus and organelles surrounded by membrane Cannot make their own food Digest their own food Can move from place to place . Symmetry.

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Invertebrate Animals

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  1. Invertebrate Animals Chapter 6 Section 1

  2. What is an animal? • Many-celled organisms that are made of different kinds of cells • Most have nucleus and organelles surrounded by membrane • Cannot make their own food • Digest their own food • Can move from place to place

  3. Symmetry • To study animals, you must look at their symmetry. • Symmetry- arrangement of individual parts of an object • Most animals have radial or bilateral symmetry • Radial: body parts arranged in circle around central point • Bilateral: have parts that are mirror images

  4. Symmetry • Some have no definite shape. • Asymmetrical • Bodies can’t be divided into matching halves • Examples: • Radial: jellyfish • Bilateral: lobsters • Asymmetrical: sponges

  5. Animal Classification Animals divided into two groups: vertebrates invertebrates Vertebrates: have backbone Invertebrates: no backbone

  6. Invertebrates • Invertebrates divided into two smaller groups: • Sponges • Cnidarians • Flatworms • Roundworms • Mollusks • Annelids • Arthropods • Echinoderms

  7. Exit Ticket • Choose one of the following questions and answer it in a complete sentence on a sheet of paper. • 1. What is the difference between vertebrates and invertebrates? • 2. What are the different types of symmetry? Explain them.

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