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Animal Kingdom

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					Animal Kingdom
What do the villi and
 microvilli do in the
  digestive system?
                   Animal Kingdom
I.   Multicellular, Eukaryotic, Heterotroph with No
     Cell Wall
II. Motile for part of life
III. Symmetry
     A.     Asymmetry-no true shape
     B.     Radial-can be divided along many plane equally
     C.     Bilateral-can be divided along one plane equally
          1. Better muscular control
IV. Digestive track
  A.     Incomplete digestive track-1 opening
  B.     Complete digestive track-2 openings
       1. Some have folds (villi and microvilli)
           a. Increase surface area
           b. Increase absorption of nutrients
                    Animal Diversity
I.        Sponges
     A.    Asymmetrical aquatic animal
     B.    Simplest multi-cellular organism
     C.    Adults are sessile (non moving)
     D.    Filter Feeders-filter water through pores
     E.    Reproduction
          A. Hermaphrodites-produce both sperm and egg
          B. Internal fertilization
          C. External fertilization
II.        Cnidarians (jellyfish, hydras, coral)
      A.     Radial Symmetry
      B.     Incomplete digestive system (nematocyst)
      C.     Sexual and Asexual reproduction
What are examples of
     annelids and
      arthropods?
III. Flatworms
   A.  Bilateral Symmetry
   B.  Incomplete digestion or parasitic
   C.  Sense pits, eyespots and “brain”
   D.  Reproduction
     1. Sexual-Hermaphrodite
     2. Asexual-regeneration
   E. Ex. Planarian, Tapeworm




Tapeworms can
grow larger than
12 feet
IV. Round Worms (Nematodes)
  A.   Bilateral Symmetry
  B.   Free living or parasite
  C.   Complete digestive system
                        25% of
                        population,
                        can grow 13
                        inches long,
                        lay 300,000
                        eggs
V.        Annelids (segmented worms)
     A.    Bilateral Symmetry
     B.    Free living or parasitic
     C.    Complete digestive tract (with villi)
     D.    Segmented body with better muscles
     E.    Hermaphrodites
VI. Mollusks-snails, slugs, clams, octopus
  A.   Bilateral
  B.   Complete digestive tract
  C.   Some have mantle that secretes shell
  D.   Most are separate sexes
  E.   Use gills or lungs for respiration
VII. Arthropods
  A.   Bilateral symmetry
  B.   Exoskeleton-suit of armor
  C.   Jointed appendages
  D.   Gills or lungs
  E.   Antennae to detect chemicals
  F.   Pheromones-chemicals used to communicate
G. Eyes for vision
H. Complete digestive tract
I. Separate sexes with external or internal
   fertilization
J. Metamorphosis-change in body shape and form
   1. Complete-egg, larva, pupil (cocoon), adult
   2. Incomplete-Egg, nymph, adult
K. Arthropods includes
   1. Arachnids (spiders, scorpions, ticks)
   2. Crustaceans (crabs, lobsters, shrimp)
   3. Millipedes, centipedes, horseshoe crabs
   4. Insects (largest group)
    What are the
characteristics of the
 amphibians and the
     mammals?
VIII. Star Fish
  A.   Radial symmetry
  B.   Water Vascular system with tube feet
IX. Fishes
  A.   Gills, fins, scales
  B.   Separate sexes
  C.   Lateral Line System-detects movement
  D.   Swim Bladder-control depth of swimming
X.        Amphibians
     A.    Ectothermic-body temperature changes
     B.    Go through metamorphosis
     C.    Respire through lungs and skin
     D.    External fertilization and lay eggs in water
XI. Reptiles
  A.   Ectothermic
  B.   Internal fertilization and lay eggs on land
  C.   Herbivores and Carnivores
  D.   Jacobson’s organ-Snakes pick up chemicals on
       tongue and analysis in organ
XII. Birds (class Aves)
  A.   All have feathers-lightweight modified scales
  B.   No other animal has feathers
  C.   Hypothesize that reptiles are ancestors
  D.   Lungs and air sacs for respiration
  E.   Endothermic-body temperature stays same
XIII. Mammals
  A.     Endothermic, have hair, produce milk
  B.     WE CAN LEARN
  C.     Types of Mammals
       1. Placental Mammals (95%)-have uterus and
           placenta to nourish embryo
       2. Pouched Mammals (Marsupials)-develop in
           mother and in pouch
       3. Monotremes-egg layers, only 3 species known
           (duck-billed platypus, 2 spiny anteater)

				
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