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Animals

Animals. Heterotrophic Multi-cellular Most can move More complex No cell walls. 3 Challenges All Animals Face:. What size, and shape am I? How do I sense/respond to things? How do I move? What supports me? (There are others and we will be covering those in the coming days!).

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Animals

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  1. Animals • Heterotrophic • Multi-cellular • Most can move • More complex • No cell walls

  2. 3 Challenges All Animals Face: • What size, and shape am I? • How do I sense/respond to things? • How do I move? What supports me? (There are others and we will be covering those in the coming days!)

  3. What does my body look like? • Three types of symmetry: Bilateral symmetry Radial symmetry Asymmetry http://www.misterteacher.com/orange%20and%20black%20butterfly.jpg http://www.hope.edu/academic/art/past/VanderBurgh/mapleave.rose2.jpg http://daphne.palomar.edu/design/asymm/jd01asym.jpg

  4. Specifics on Symmetry • No symmetry (Asymmetrical): can’t cut the organism in any way to get even halves • Bilateral: can cut in 2 even halves • Radial: can cut several ways to get even halves • Pentaradial: special type of radial symmetry • Can cut 5 different ways • Example: Seastar

  5. How do I move? What supports me? • Can be invertebrates or vertebrates • What’s the difference? Invertebrates vs. Vertebrates * No backbone * backbones *often have exoskeletons * endoskeletons

  6. Types of Skeletons • Hydroskeletons: • Invertebrates living in water • Fluids allow animal to hold its shape • Exoskeletons: External skeleton • Hard jointed body of chitin • Have to molt to grow • Endoskeletons: • Vertebrates and echinoderms • Support, protection, & movement • Can be cartilage or bone

  7. Segmentation? • Repeating Parts or segments • Paired with bilateral symmetry • Can be internal or external repetition • Examples: worms, insects, vertebrates • Are we segmented?

  8. Support & Movement: Limbs • Appendages or Limbs: • Bristles, Legs, Flippers, Wings • Internal support or external support differs between invertebrates and vertebrates

  9. How do I sense/respond to things? • I might have cephalization • A concentration of sense organs and nerve cells at anterior end  can be a “head” • This area is often different than other parts of the body • Who would have a head? • Does size matter? Invertes vs. Vertes? Other? • Nerve Net: • Net like nervous system, no central head 

  10. Invertebrates

  11. vertebrates

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