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Kingdom Animalia

Kingdom Animalia. Invertebrates: Critters with no backbone. -Porifera -Cnidaria -Worms: Flatworms, Roundworms, Annelida -Mollusks Arthropods Echinoderms. Porifera: The Sponges. Cnidaria- Jellyfish, anemones, coral, hydra. Flatworms. Roundworms. Annelids (segmented worms. Mollusks.

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Kingdom Animalia

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  1. Kingdom Animalia

  2. Invertebrates: Critters with no backbone • -Porifera • -Cnidaria • -Worms: Flatworms, Roundworms, Annelida • -Mollusks • Arthropods • Echinoderms

  3. Porifera: The Sponges

  4. Cnidaria- Jellyfish, anemones, coral, hydra

  5. Flatworms Roundworms Annelids (segmented worms

  6. Mollusks

  7. Arthropods: Segmented Legs

  8. Echinoderms: Spiny Skin

  9. Vertebrates – Backbones

  10. Which of these is an “animal”?

  11. Answer: They are all animals! Characteristics of Animals: • heterotrophic • eukaryotic • Multicellular • Show motility at some point • lack cell walls • 95% = invertebrates (do not have backbone) ex. Insects to squid5% = vertebrates (have a backbone) ex. Mammals, reptiles, fish

  12. Animal Functions • Feeding: Herbivore = eats plants Carnivore = eats animals Omnivore = eats plants and animals Detritivore = feed on decaying organic material Filter Feeders = aquatic animals that strain food from water Parasite = lives in or on another organism (symbiotic relationship)

  13. 2. Respiration: Take in O2 and give off CO2 Lungs, gills, through skin, simple diffusion

  14. 3. Circulation: -Very small animals rely on diffusion-Larger animals have a circulatory system to move materials throughout their bodies

  15. 4. Excretion: Primary waste product is ammonia 5. Response:Receptor cells = sound, light, external stimuliNerve cells => nervous system 6. Movement: * Most animals move

  16. 7.  Reproduction: Most reproduce sexually = genetic diversity Many invertebrates can also reproduce asexually to increase their numbers rapidly

  17. Body Symmetry - the body plan of an animal, how its parts are arranged Asymmetry - no pattern (corals, sponges) Radial Symmetry - shaped like a wheel (starfish, hydra, jellyfish) Bilateral Symmetry -  has a right and left side (humans, insects, cats, etc)

  18. Identify the Symmetry

  19. Cephalization - an anterior concentration of sense organs (to have a head) *The more complex the animals becomes the more pronounced their cephalization

  20. Anatomical Terms: anterior - toward the head posterior - toward the tail dorsal - back side ventral - belly side

  21. Segmentation - "advanced" animals have body segments, and specialization of tissue (even humans are segmented, look at the ribs and spine)

  22. Trends in Animal Evolution Early Development: Animals begin life as a zygote (fertilized egg)

  23. The cells in the zygote divide to form the BLASTULA - a hollow ball of cells

  24. Examples for each?? The blastula pinches inward to form three GERM LAYERS

  25. *Most invertebrates *All vertebrates & Echinoderms (invertebrates)

  26. Body Cavities • Coelom – lies between the digestive tract and the body wall • Important because it provides space in which internal organs can be suspended • Provide room for internal organs (growth) • Some cavities have fluids that are involved in circulation, feeding & excretion • Acoelomates – no coelom ex. flatworm • Pseudocoeloms – similar to coelom, but lack a mesoderm ex. roundworm

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