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Lecture 5 Animal Evolution – The Invertebrates

Lecture 5 Animal Evolution – The Invertebrates. Primary Tissues. Ectoderm ; lines the body surface Endoderm ; layers the inner gut lining Mesoderm ; forms in between these two, sources of muscles, forms many organs. Radial animals have all the tissues except mesoderm

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Lecture 5 Animal Evolution – The Invertebrates

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  1. Lecture 5Animal Evolution – The Invertebrates

  2. Primary Tissues • Ectoderm; lines the body surface • Endoderm; layers the inner gut lining • Mesoderm; forms in between these two, sources of muscles, forms many organs. • Radial animals have all the tissues except mesoderm • Bilateral animals have all three tissues

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