Animalia

• Also known as [[Metazoa]]
• A member of the [[Opisthokonta]]
• Multicellular
• Most basal of Metazoa: [[Sponge]]
  • Water enters through the [[ostia]] and exits through the [[osculum]]
  • [[flagellated chamber]]
    • Separating the ostia and the [[spongocoel]]
  • Different cell types
    • Outer layer: [[pinacoderm]]
    • Controlling the ostia: [[porocytes]]
    • Controlling the flagella, eating: [[choanocytes]]
    • Transport nutrition: [[amoebocytes]]
• A few taxa of interest with respect to the origin of animals:
  • [[Sponges]]
  • [[Cnidarians]]
  • [[Ctenophores]]
  • [[Bilateria]]
• Goes through [[Cleavage Divisions]]
• Required to be [[multicellular]] and go through [[morphogenesis]]

Taxonomy

• [[Animalia]]
  • [[Porifera]] (Parazoa)
    • [[Sponges]]
  • [[Eumetazoa]] (2 germ layers, ecto- and endo-, "true tissues")
    • [[Radiata]]
      • [[Cnidaria]]
    • [[Bilateria]] (3 germ layers, meso-)
      • [[Deuterostomia]]
        • [[Echinodermata]]
        • [[Chordata]]
      • [[Protostomia]]
        • [[Lophotrochozoa]]
          • [[Annelida]]
          • [[Mollusca]]
          • Flatworms
        • [[Ecdysozoa]]
          • [[Arthropoda]]
          • [[Nematoda]]