Animal kingdom

• Porifera

  • Body with pores and canals in walls
  • Cellular level of organisation
  • Various symmetry
  • Absent coelom
  • Absent segmentation
  • Absent digestive system
  • Absent circulatory system
  • Absent respiratory system
• Coelenterata (Cnidaria)


  • Tissue level of organisation
  • Radial symmetry
  • Absent coelom
  • Absent segmentation
  • Incomplete digestive system
  • Incomplete circulatory system
  • Absent respiratory system
  • Cnidoblasts present
  • Comb plates for locomotion
• Ctenophora

  • Tissue level of organisation
  • Radial symmetry
  • Absent coelom
  • Absent segmentation
  • Incomplete digestive system
  • Incomplete circulatory system
  • Absent respiratory system
• Platyhelminthes

  • Organ-system level of organisation
  • Bilateral symmetry
  • Absent coelom
  • Absent segmentation
  • Incomplete digestive system
  • Absent circulatory system
  • Absent respiratory system
  • Flat body, hooks and suckers are features
• Aschelminthes

  • Organ-system level of organisation
  • Bilateral symmetry
  • Pseudocoelom
  • Absent segmentation
  • Often worm-shaped, elongated
• Annelida

  • Organ-system level of organisation
  • Bilateral symmetry
  • Coelom present
  • Segmentation present
  • Complete digestive system
  • Complete circulatory system
  • Absent respiratory system
  • Body segmentation like rings
• Arthropoda

  • Organ-system level of organisation
  • Bilateral symmetry
  • Coelom present
  • Segmentation present
  • Complete digestive system
  • Complete circulatory system
  • Complete respiratory system
  • Exoskeleton of cuticle, jointed appendages
• Mollusca

  • Organ-system level of organisation
  • Bilateral symmetry
  • Absent coelom
  • Absent segmentation
  • Complete digestive system
  • Complete circulatory system
  • Complete respiratory system
  • External skeleton of shell usually present
• Chordata

  • Organ-system level of organisation
  • Bilateral symmetry
  • Coelom present
  • Segmentation present
  • Complete digestive system
  • Complete circulatory system
  • Complete respiratory system
  • Solid dorsal Notochord, dorsal hollow nerve cord, gill slits with limbs or fins
• Echinodermata

  • Organ-system level of organisation
  • Radial symmetry
  • Coelom present
  • Absent segmentation
  • Complete digestive system
  • Complete circulatory system
  • Complete respiratory system
  • Water vascular system, radial symmetry
• Hemichordata

  • Organ-system level of organisation
  • Bilateral symmetry
  • Coelom present
  • Segmentation present
  • Complete digestive system
  • Complete circulatory system
  • Complete respiratory system
  • Worm-like with proboscis, collar and trunk
• Triploblastic,Bilateral, Acoelom

  Platyhelminthes
• Exclusively marine

  Ctenophora