What am I

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What am I?

• Organisms to identify using your dichotomous key

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THIS DIVERSE GROUP OF ANIMALS DO NOT HAVE
VERTEBRAE
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• Most primitive of all invertebrates
• Variety of shapes, sizes, and colors
• Porous sessile are two of my characteristics
• Filter feeders
• Have no organs

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• JUST A WORD ABOUT SYMMETRY.
• If an organism has body parts that repeat around
  an imaginary line drawn through the center of
  their body.. We call this RADIAL symmetry.
• If an organism can be divided into two mirror
  images, which means it most likely has a head
  tail, front, back We call this BILATERAL
  symmetry.

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• Anterior and posterior end
• both mouth and anus present
• body has sections, or true segments

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We all LIVE UNDER THE SEA
Our bodies are covered with a hard, spiny, or
leathery covering. There are two openings in our
digestive system
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• radial symmetry
• single opening in digestive cavity
• sac like animals with stinging cells and
  tentacles
• no organs present

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I have no segments in my body, but have a well
developed digestive system with two openings
many animals in this phylum are parasites!!!
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Often called flatworms have a digestive system
with only one opening simplest animals with
heads often are parasitic
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• Largest and most diverse phylum
• key characteristics are jointed appendages and
  exoskeleton made of chitin

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• Soft bodied animals that often have an
  unsegmented shell
• Most are aquatic but a few are terrestrial

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• WHAT IS A VERTEBRATE ANIMAL?
• HAVE A NOTOCHORD EARLY IN THEIR DEVELOPMENT THAT
  IS REPLACED BY A STRONGER SUPPORTING STRUCTURE
  CALLED A VERTEBRAL COLUMN.
• THIS IS MORE COMMONLY KNOWN AS A BACKBONE

The rest of the animals in this classification
activity have vertebrae.
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• We feed on blood and body fluids, or even dead
  and decaying carcasses
• as odd as it may seem, we have no jaws
• no paired fins or scales

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• Bony skeleton
• gills covered by a bony operculum
• most have swim bladder to control buoyancy

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• Skin with scales
• use lungs to breathe
• ectotherm (depend on external heat source)

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• Skeleton made of cartilage
• no swim bladder (increase buoyancy by storing
  large amounts of oil in liver)
• no bony gill cover present(operculum)

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• We have
• aquatic and terrestrial stages in our lives
• no protective covering on our skin
• toes (if present) usually lack claws

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We are endotherms, which means we can regulate
our body temperature by metabolic processes
front limbs are wings mouth has beak
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At least some part of our bodies are covered with
hair young are fed milk specialized teeth
present
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Bonus..
How would I be classified?