Metazoa

Metazoan Animals

Kingdom:	Animalia
Subkingdom:	Metazoa

Phyla

Radiata
- - Cnidaria
  - Ctenophora - Comb jellies
Bilateria
- Protostomia
  - Acoelomorpha
  - Platyhelminthes - Flatworms
  - Nemertina - Ribbon worms
  - Gastrotricha
  - Gnathostomulida - Jawed worms
  - Micrognathozoa
  - Rotifera - Rotifers
  - Acanthocephala
  - Priapulida
  - Kinorhyncha
  - Loricifera
  - Entoprocta
  - Nematoda - Roundworms
  - Nematomorpha - Horsehair worms
  - Cycliophora
  - Mollusca - Mollusks
  - Sipuncula - Peanut worms
  - Annelida - Segmented worms
  - Tardigrada - Water bears
  - Onychophora - Velvet worms
  - Arthropoda - Insects, etc.
  - Phoronida
  - Ectoprocta - Moss animals
  - Brachiopoda
- Deuterostomia
  - Echinodermata
  - Chaetognatha - Arrow worms
  - Hemichordata - Acorn worms
  - Chordata - Vertebrates, etc.

Metazoa is the subkingdom in the tree of life that includes most of the multi-celled animals. More specifically, metazoa evolved differentiated cells including nerve cells and muscles.

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