animalia

• Kingdom Animalia


  The animal kingdom can be divided into 9 smaller groups called phyla
• Phylum Porifera (Sponges)


  • Sessile animals (they spend their lives attached to rocks)
  • Water enters small pores, travels through canals, and exits through a large hole at the top
• Phylum Cnidaria (Jellyfish, sea anemones, corals)


  • Have tentacles with stinging cells
  • Can have two body shapes: umbrella-shaped medusa or vase-shaped polyp
  • Coral reefs contain many members

  
• Phylum Platyhelminthes (Flatworms)


  • Very thin and flat
  • Have bilateral symmetry
  • First animals to have a head, with hooks and suckers
• Phylum Nematoda (Roundworms)


  • Not segmented, body surfaces appear smooth
  • Many are parasites
  • Have a complete digestive tract with mouth and opening for waste
• Phylum Mollusca (Clams, snails, squid, octopus)


  • Most have a hard shell covering soft bodies
  • Clams have a muscular foot for locomotion
  • Breathe by means of gills
  • Not all have shells
• Phylum Annelida (Earthworms, sandworms, leeches)


  • Bodies are segmented
  • Have a circulatory system with multiple hearts
  • Have a body cavity called a coelom
• Phylum Arthropoda (Crayfish, lobsters, crabs, insects, spiders)


  • Have jointed legs
  • Have a crunchy exoskeleton
  • Have well-developed sense organs
• Phylum Echinodermata (Starfish, sand dollars, sea urchins)


  • Have spiny (prickly) skin
  • Have radial symmetry as adults
  • Have tube feet for locomotion
• Phylum Chordata (Fish, amphibians, reptiles, birds, mammals)


  • Have a backbone (are vertebrates)
  • Can be subdivided into 7 classes
• Classes of Phylum Chordata


  • Agnatha (jawless fish)
  • Chondrichthyes (cartilage-skeleton fish)
  • Osteichthyes (bone-skeleton fish)
  • Amphibia
  • Reptilia
  • Aves
  • Mammalia