kingdom animalia. characteristics eukaryotic organisms multicellular no cell walls heterotrophs...
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Kingdom Animalia
Characteristics
Eukaryotic organisms
Multicellular
No cell walls
Heterotrophs (consumers)
Characteristics
Specialized tissues for impulses and movement (nervous system)
Movement relates to ability to find food
Most develop from Zygotes
Body Plans - Symmetry
Animals that are irregular in shape are asymmetrical
Animals that are regular in shape are symmetrical
Symmetry An animal has radial
symmetry if it can be divided along any plane, through a central axis, into even halves
An animal has bilateral symmetry if it can be divided down it's length into similar right and left halves
Bilateral Symmetry
Those with Bilateral Symmetry have:
Dorsal (top)
Ventral (bottom)
Anterior (front)
Posterior (back)
Invertebrates
8 main Phyla
No backbones
95% of all animals belong to this group
Phylum Porifera
Examples: Tube Sponge, Glass Sponge, Sea Sponge
Phylum Porifera
Approx. 5 000 species
Sessile (immobile) Asymmetrical No mouth or digestive cavity Marine or fresh water
Phylum Cnidaria
Examples: Jellyfish, Hydra, Sea anemones, and corals
Phylum Cnidaria
Approx. 10 000 species
Sessile or motile Medusoid (jellyfish) or polyp (inverted jellyfish)
form in life cycle Radial symmetry Mostly marine, some fresh water
Phylum Platyhelminthes(flatworms)
Examples: Planaria, Tapeworm, Tubellarians, Flukes
Phylum Platyhelminthes
Approx. 19 000 species
Free-living in marine or fresh water, or parasitic Body flattened dorsoventrally Mouth only
Phylum Nematoda(roundworms)
Examples: Hookworm, pinworm, Trichinella
Phylum Nematoda
Approx. 20 000+ species
Cylindrical, slender, tapered at either end Free-living or parasitic
Phylum Annelida(segmented worms)
Examples: Earthworms, leeches, polychaetes
Phylum Annelida
Approx. 12 000+ species
Segmented body Terrestrial and aquatic Mouth and anus
Phylum Mollusca
Examples: Snails, clams, squids
Phylum Mollusca
Approx. 100 000+ species
Muscular foot Shell present in many forms All habitats
Phylum Arthropoda
Examples: Insects, crab, mites, ticks, spiders, centipedes
Phylum Arthropoda
Approx. 1 000 000+ species
Segmented body, some segments may be fused
Jointed appendages External skeleton
Phylum Echinodermata
Examples: Starfish, Sea Cucumbers, Sea Urchins
Phylum Echinodermata
Approx. 7 000 species
Adults have pentamerous (five-sided) radial symmetry
marine
Vertebrates
Have backbones
1 main Phyla
Only 5% of animals belong to this group, including us
Phylum Chordata
Examples: Fish, amphibians, reptiles, birds, mammals
Phylum Chordata
Approx. 7 000 species
Notochord (flexible rod shaped body of embryo) at some time in life history
Bilateral symmetry