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Introduction to Animals: A Diverse Kingdom

Explore the characteristics of all animals, from multicellular organization to movement, and learn about the classification of the Animal Kingdom. Discover the significance of heterotrophy, sexual reproduction, and the various phyla within the kingdom. Dive into the world of invertebrates and vertebrates, understanding the principles of symmetry in animals.

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Introduction to Animals: A Diverse Kingdom

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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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