animal classification the animal kingdom basic characteristics of animals: 1. 2. 3. nine animal...
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Animal Classification
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THE ANIMAL KINGDOM
BASIC CHARACTERISTICS OF ANIMALS: 1. 2. 3.
NINE ANIMAL PHYLA INVERTEBRATES:
VERTEBRATES (CORDATES): (1 phylum)
MULTICELLULAR ORGANISMS- Eukaryotic
CAPABILITY OF LOCOMOTION
MUST INGEST FOOD
(8 PHYLA)
ALL LACK INTERNAL SKELETON, SOME HAVE EXOSKELTON OR SHELL
INTERNAL SKELTON MADE OF BONE/ CARTILAGE.
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1. Phylum PORIFERA:• ‘Pore- Bearing”
• Filter feeders
• Asymmetrical
• Feed and get rid of wastes thru diffusion
• Sessile=nonmotile, attached
to a surface while living
• Ex.- sponges
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2. Phylum CNIDARIA
EXAMPLES: CORAL, JELLYFISH, SEA ANEMONE
• Have stinging tenacles
• Stun prey with toxins
• Prey is drawn into mouth and dissolved/ digested
• Radial symmetry
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Polyps: Sea anemones
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Purple striped jelly, Pelagia panopyra
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3. Phylum PLATYHELMINTHES:
EXAMPLES: PLANARIA, FLUKE, TAPEWORM
• Flat worms
• One opening for ingestion and elimination
• Primitive nervous system
• Exchange gases by diffusion thru moist membranes
• Bilateral symmetry
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Planarian
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4. Phylum ANNELIDA
EXAMPLES: LEECH, EARTHWORMS
• Segmented worms
• Each segment has a nervous. circulatory,
excretory, muscular system
• Bilateral symmetry
• First organism with complex body systems
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5. Phylum Nematoda• Round worms• Have long, slender bodies• Have a hollow, fluid filled body cavity• Most are free-living on land or in fresh or salt water• Many species are parasitic
Examples- Ascaris, hookworms, pinworms
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6. Phylum ARTHROPODA
EXAMPLES: SHRIMP, LOBSTER, CRAB, BARNACLE
• Animals with jointed appendages
• Have an exoskeleton
• They shed their exoskeleton (molt)
• We study crustaceans – these are marine arthropods
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7. Phylum MOLLUSCA• All have a soft body
• There are 3 classes: gastropods, bi-valves, cephalopods
• Most have an external shell.
• Have bi-lateral symmetry
• Cephalopods are extremely intelligent
• ex.- snail, clams, squid, octopus, cuttlefish, nautilus
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8. Phylum ECHINODERMATA
• Have spiny bodies
• Radial symmetry
• Benthic- bottom dwellers
• Central mouth on ventral surface
• ex.- sea urchin, sea star, sea cucumber, sand dollar
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9. Phylum CHORDATA
• Have a backbone that protects the spinal cord=ALL vertebrates!!!
• Most developed nervous system
• Contains animals that we are most familiar with
• ex.- fish, mammals, reptiles,
amphibians, birds