Kingdom Animalia Characteristics

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Kingdom AnimaliaCharacteristics

• Heterotrophs
• Eukaryotic
• Multicellular
• No cell wall, no chloroplasts
• Motile
• Sense Organs

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9 phyla we will mention

• Poriferasponges
• Cnidariajellyfish, sea anemones, coral
• Platyhelminthesflatworms
• Nematodaroundworms
• Annelidaearthworms
• Molluscashelled animals
• Arthropodainsects, spiders
• Echinodermataspiny-skinned
• Chordatavertebrates (and others)

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Phylum Porifera(sponges)

• Asymmetrical
• Poresfilter feeders
• Not motile (sessile)
• Provide habitat for other animals
• Eaten by starfish and some fish
• Most primitive animal

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Phylum Cnidaria(jellyfish, sea anemones, coral)

• Digestive cavity called a coelenteron
• Radial symmetry
• Predators-feed on crustaceans
• Corals provide important habitat for fish
• Coral used for decoration and threatened by
  pollution
• All have stinging cells

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Phylum Platyhelminthes(planarians, tapeworms,
flukes)

• Bilateral symmetry
• Cephalization- head and brain
• Acoelomate- no body cavity
• Incomplete digestive system (one opening)
• Some are parasites in digestive tract
• In early 1900s models ate them to be thinYUK!

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Phylum Nematoda(roundworms)

• Also called nematodes
• Complete digestive system-separate mouth and anus
  (2 openings)
• Pseudocoelomate
• Decomposers, predators (bacteria, inverts)
• Eaten by insects, mice
• Beneficial to garden by eating insects

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Phylum Annelida(segmented worms)

• i.e. earthworms, leeches
• True coelom
• Sensitive to vibrations on ground-rain
• Prey for robins, shrews, jays, snakes
• Leeches have cornified knobs to break skin,
  anticoagulant and anesthetic

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Phylum Mollusca(shelledsometimes)

• i.e. snails, slugs, clams, mussels, scallops,
  oysters, octopus and squid
• Variety in form
• Giant squid sea serpent
• Introduction of garden snails

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Phylum Arthropoda(jointed legged animals)

• i.e. insects, spiders and scorpions, shellfish
  (crustaceans), centipedes (1 pr legs per
  segment), millipedes (2 pr)
• Exoskeleton
• Metamorphosis
• Pheromones
• Molting

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Phylum Echinodermata(spiny-skinned)

• i.e. sea stars starfish,
• sea urchins
• Water vascular system
• Tube feet
• Important predators

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Phylum Chordata(includes the vertebrates)

• i.e. fish, sharks, amphibians, reptiles, birds,
  mammals
• Notochord, nerve cord, gill slits, tail