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metazoa 後生動物 - Coggle Diagram

- - - - phylum
        
        cnidaria
        
        -have true tissues
        
        -have two embryonic germ cell types, endoderm and ectoderm
        
        -radially symmetrical + have gastrovascular cavity with single opening (serves as both mouth and anus)
        
        -are carnivores that use tentacles to capture prey
        
        -tentacles armed with cnidocytes(stinging cell)
        
        nematocyst=specialised stinging cell inside cnidocyte, projects and shoots toxins into the prey
        
        nematophore=a protective structure supporting cnidocytes, tentacles that has nematocyst on it
        
        -cindocytes are cells that function in defence and capture of prey
        
        wide range of forms
        
        polyp 息肉(non motile)：tube shape, sessile ring of tentacles on mouth, attached to a substrate like a rock
        
        medusa蜇(motile): umbrella shape move freely, hang downward
        
        only 1 opening in cnidarian
    - - deuterostomia
        
        lophotrochozoa
        
        platyhelminthes
        
        syndermata
        
        ectoprocta
        
        common feature
        
        brachiopoda
        
        annelida
        
        mollusca
        
        ecdysozoa
        
        nematoda
        
        anthropoda
      - acoela