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Classifying Animals

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Porifera: Sponge. Phylum Porifera: Sponges are ... Roundworms: One of the most diverse of all animals. ... Roundworms have a two ended digestive system. Worms ... – PowerPoint PPT presentation

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Title: Classifying Animals


1
Classifying Animals
  • Lesson 4

2
3 Ways to Classify Living Things
  • First, study the cell structure. Is it plant, or
    animal?
  • Second, how does an organism get nutrients? (How
    does it eat?)
  • Third, how does an organism reproduce? (Bacteria
    have cells that split, a tree might flower and
    seed.)

3
Invertebrate Animals
  • An invertebrate is an organism that lacks a
    backbone.
  • Sponges, Cnidarians, Mollusks, Echinoderms,
    Arthropods and Worms are all examples of
    Invertebrate animals.

4
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5
Simple Invertebrates
  • Include, Sponges, Cnidarians and Worms.
  • Most simple invertebrates live in aquatic
    environments. (water)

6
Porifera Sponge
  • Phylum Porifera Sponges are animals that have
    no true organization.
  • Sponges have no real tissue or organs.
  • Sponges are asymmetrical

7
Porifera Sponge
8
Cnidarians
  • Jellyfish, Sea Anemones, corals, and Hydras
  • Cnidarians have radial symmetry
  • Cnidarians have a mouth, tentacles, muscle
    tissue, and stinger cells.
  • (Cnidarians look the same right side up as they
    do upside down.)

9
Cnidarians
10
Worms
  • Flatworms Flatworms are the simplest of the
    worm groups. They are found many places and can
    be free living or parasitic. (Tape worm) Only
    has a one ended digestive system.

11
Worms
  • Roundworms One of the most diverse of all
    animals. They are found in many places and can be
    free living or parasitic. (Roundworms are what
    you treat your pets for!) Roundworms have a two
    ended digestive system.

12
Worms
  • Segmented worms Annelids are segmented, with
    each segment bearing the same fundamental
    structures as all the others, though minor
    differences can occur between some segments. By
    distributing organs among many segments, it
    becomes less dangerous to an annelid if one organ
    is damaged.
  • (These are what you fish with!)

13
Complex Invertebrates
  • Mollusks, Echinoderms and Arthropods are all
    included in Complex Invertebrates.
  • Complex Invertebrates live in many different
    environments.
  • Some have specialized organs and body structures.

14
Mollusks
  • All Mollusks share the same body plan.
  • All have a muscular foot
  • Mantle
  • Internal organs
  • Bilateral symmetry
  • Includes, snails, clams, and squids.

15
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16
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17
Echinoderms
  • Include Sea Stars, Sea Urchins, and sea Cucumbers
  • Echinoderms have a hardened skeleton inside the
    body. (Endoskeleton)
  • Echinoderms use a water pressure system to feed,
    breathe and move.

18
Echinoderms
19
Arthropods
  • Most numerous animal group on Earth!
  • Include Spiders, Crabs, and Insects.
  • Hard Exoskeleton on the outside of their body.
  • Segmented body, with paired limbs on either side
    of their body.
  • Some have wings, claws, or multiple legs

20
Arthropods
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