Transcript animal kingdom classification

ANIMAL KINGDOM
CLASSIFICATION
Animals can be grouped into two large categories:
Vertebrates and Invertebrates.
Vertebrates have backbones and invertebrates DO NOT.
Invertebrates
95% of all animals are invertebrates!
The major phyla of invertebrates are:
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Phylum Porifera
Phylum Cnidaria
Phylum Platyhelminthes
Phylum Nematoda
Phylum Mollusca
Phylum Annelida
Phylum Arthropoda
Phylum Echinodermata
Porifera
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These are the simplest invertebrates.
All sponges are asymmetric
They have no tissues, organs or organ systems.
They just have specialized cells.
They all live in water.
Cnidarians
 Cnidarians do not have organs or organ systems.
 They have radial symmetry.
 They have a single body opening surrounded by
tentacles.
 They have simple tissue to carry out body functions.
 They have specialized cells to capture food.
Echinoderms
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Radial symmetry
Hard plates embedded in the skin
Live only in oceans
Complete digestive systems
Tube feet
Include sea stars, sea cucumbers and sea urchins
Platyhelminthes
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They have bilateral symmetry
They have nerve, muscle and digestive tissues
They have a simple brain
They have soft, flattened bodies
Have a mouth
Most are parasites.
Nematoda
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Roundworms
Bilateral symmetry
Nerve muscle and digestive tissues
Simple brain
Round bodies with mouth and anus
Mollusks
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Bilateral symmetry
Soft bodies
Some have hard shells
Digestive system with two openings
Body cavity with heart, stomach and other organs.
Eyes and a simple brain
Must remain wet
Annelids
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Bilateral symmetry
Soft bodies
Circulatory system
Simple brains
Includes earthworms, leeches, etc.
Arthropods
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Includes insects, spiders, shrimp, crab and relatives
Insects, arachnids and crustaceans
Bilateral symmetry
Exoskeletons
Jointed appendages