26-1 Introduction to the Animal Kingdom - Hamilton Local Schools
26-1 Introduction to the Animal Kingdom - Hamilton Local Schools
26-1 Introduction to the Animal Kingdom - Hamilton Local Schools
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<strong>26</strong>-1 <strong>Introduction</strong> <strong>to</strong> <strong>the</strong> <strong>Animal</strong><strong>Kingdom</strong>Trends in <strong>Animal</strong> EvolutionBody Cavity FormationMost animals have a body cavity, a fluid-filledspace between <strong>the</strong> digestive tract and body wall.A body cavity provides a space in which internalorgans can be suspended so that <strong>the</strong>y are notpressed on by muscles or twisted out of shape bybody movements.Slide33 of 49Copyright Pearson Prentice HallEnd Show
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