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INTRO TO THE ANIMAL KINGDOM

INTRO TO THE ANIMAL KINGDOM. What is an Animal? . Characteristics of All Animals 1. Animals are Multicellular 2. Animals are Eukaryotic 3. Animals are Heterotrophs 4. Animal cells lack cell walls. Evolutionary/Developmental Milestones in Animals.

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INTRO TO THE ANIMAL KINGDOM

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  1. INTRO TO THE ANIMAL KINGDOM

  2. What is an Animal? Characteristics of All Animals 1. Animals are Multicellular 2. Animals are Eukaryotic 3. Animals are Heterotrophs 4. Animal cells lack cell walls

  3. Evolutionary/Developmental Milestones in Animals • Cellspecialization and levels of organization • Development of body symmetry and segmentation • Development of an internal body cavity and tissue layers

  4. Cell Specialization Cells throughout a multicellular organism can develop in different ways to perform different tasks.

  5. Levels of Organization

  6. Body Symmetry Symmetry in biology is the balanced distribution of duplicate body parts or shapes. The body plans of most multicellular organisms exhibit some form of symmetry, either… • Radial Symmetry:A body plan in which all body parts of an organism are arranged around a central point OR • Bilateral Symmetry:a single plane divides the body into two mirror images A small minority exhibit no symmetry- • Asymmetry:cannot be divided into mirror images

  7. Body Segmentation Segmentationallows development of various specialized limbs, such as antennae, pincers, walking legs, claws, wings, etc. Cephalizationis the concentration of nervous tissues in one location which eventually produces a head region with sensory organs and a brain.

  8. Tissue Layers & Body Cavity A body cavityis known as a coelom. The significance of having a body cavity, or a coelom, is that itincreases the efficiency of food intake and waste removal.

  9. The Animal Kingdom is divided into two main groups… Invertebrates & Vertebrates

  10. Porifera

  11. Invertebrates • Over 95% of all animal species are invertebrates • There are 8 major phyla of invertebrates from the simplest to the most complex…

  12. Invertebrates

  13. Invertebrates

  14. ANIMAL BODY SYSTEMS Body systems are all interrelated and work together to perform their functions in animals. Body systems can be organized and studies by these functions: • REGULATION: Excretory & Nervous Systems • NUTRIENT ABSORPTION: Respiration, Digestion, & Circulatory Systems • DEFENSE: Immune, Integumentary, Lymphatic, Skeletal, & Muscular Systems • Reproduction: Reproductive & Endocrine Systems

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