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Animals are Multicellular, Body Plans, Diversification of Animals - Coggle…

- - - - Bastula undergoes gastrulation, forming a gastrula with different embryonic tissue layers
  - - - juvenile resembles an adult but isnt sexually mature
- - - - germ layer covering the embryo's surface
    - - innermost germ layer and lines the developing digestive tube (archenteron)
    - - muscle layer in between ectoderm and endoderm
  - - - all bilaterally symmetrical animals are triploblastic
    - - include cnidarians
- - - - Body cavity that has one side lined by mesoderm and the other by endoderm
    - - No body cavity
    - - Possess a true coelom
  - - - share key biological features
- - - - developmental fate of embryonic cells is determined early in development
  - - - Indeterminate cleavage makes identical twins and embryonic stem cells possible
      - indeterminate cleavage, each cell in the early stages of cleavage retains the capacity to develop into a complete embryo
- - - - Lophotrochozoa
        
        have a feeding structure called lophophore; they have a developmental stage called trochophore larva. consist of only invertebrates
      - Ecdysozoa
        
        only contain intervebrates; secrete their external exoskeletons through ecdysis
      - Dueterostomia
        
        includes both vertebrates an dinvertebrates