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Animals

Animals. What is an animal? . Multicellular Heterotrophs Carnivores, herbivores, or omnivores Some are vertebrates, but most are invertebrates Most use sexual reproduction, some use asexual reproduction. Organization. Cells Tissue Organ Organ system Look familiar?. Kingdom Phylum.

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Animals

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  1. Animals

  2. What is an animal? • Multicellular • Heterotrophs • Carnivores, herbivores, or omnivores • Some are vertebrates, but most are invertebrates • Most use sexual reproduction, some use asexual reproduction

  3. Organization • Cells • Tissue • Organ • Organ system • Look familiar? • Kingdom • Phylum

  4. Adaptation • Defined: characteristics that helps an organism survive in its environment or reproduce • Some adaptations: • Herbivore • Carnivores • Predators • Prey • Omnivore • Playing ‘dead’, shells, coloring, etc.

  5. Classification • P. 19 in your textbook • Branching tree • Closer on the tree=more closely related • When classifying: • Structure of body • Embryo development • DNA

  6. Invertebrate vs. Vertebrate • No backbone • Jellyfish • Snails • Spiders • 95% • Can you name more examples? • Have backbone • Fish • Humans • Dogs • 5%

  7. Symmetry • What is symmetry?

  8. Types of symmetry • Bilateral and radial symmetry • Complex animals have one or the other • What type of symmetry do we have?

  9. Radial symmetry • Live in water • Do not move very fast • No ‘front’ or ‘back’ so they can sense their environment in all directions

  10. Bilateral symmetry • Larger • More complex • Front end that goes first with movement • Move quickly and efficiently • Front end picks up information

  11. Vertebrates more in depth • Part of a subgroup in the phylum Chordata, so they are called chordates • Have a notochord, nerve cord, and slits in their throat area • Most slits disappear before being born including humans

  12. Verts continued • Body temperature, humans =_____ • Fish, reptiles, and amphibians usually have a temperature that matches their environment, mammals and birds are warmer • Ectotherm vs. endotherm • Endoskeleton • Endo means: • Skeleton:

  13. Mammals? • Endothermic • Vertebrates • Four chambered heart • Skin with hair or fur (function?) • Born alive • Fed with milk from mother

  14. Mammals • 65 million years ago • Teeth • Getting oxygen to cells • Nervous system and senses • Movement • Reproducing and caring for young

  15. Diversity of mammals • 3 groups of mammals: monotremes, marsupials, and placental mammals • How their young develop

  16. Monotreme • Lay eggs • Platypuses • anteater

  17. Marsupials • Young are born alive, but at an early stage of development • In a pouch • Gestation period: fertilization and birth is shorter • Kangaroos • Opposums

  18. Placental • Organ that passes materials between mother and young • Most mammals • Classified into groups on the basis of how they eat or move • Dolphins • Dogs • primates

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