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Introduction to Animals

Introduction to Animals. Chapter 25. Animal Overview. Animal kingdom is extremely diverse ALL Animals are: - Multicellular Eukaryotes No cell wall Also share many other characteristics…. Characteristics of All Animals. 1) Multicellular Organization

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Introduction to Animals

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  1. Introduction to Animals Chapter 25

  2. Animal Overview • Animal kingdom is extremely diverse • ALL Animals are: - Multicellular • Eukaryotes • No cell wall • Also share many other characteristics…

  3. Characteristics of All Animals • 1)Multicellular Organization • Cells specialize to perform different functions • Allows organisms to adapt & evolve • Different cells held together by cell junctions to form tissues • 2) Heterotrophy • Herbivore (only plants) -Omnivore (both) • Carnivore (only meat) -Decomposers (dead/decaying matter)

  4. Characteristics of All Animals (con’t) • 3) Sexual Reproduction • Gametes fuse to form zygote (fertilized egg) • As zygote multiplies, cells differentiateinto body parts • 4) Movement • Nervous & Muscular system work together to control body

  5. Animal Classification • Animal Kingdom has 9 Phyla: • 8 InvertebratePhyla (no backbone) • i.e.: earthworms, insects • 1 Chordata (spinal cord) • Includes Vertebrates (have backbone) • i.e.: mammals, birds, fish

  6. Symmetry • Asymmetry: none • i.e. sponges • Radial: radiate from center (no left/right, etc) • i.e. jellyfish, sea anenomes • Bilateral: 2-sided • i.e. humans, lobsters, butterflies

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