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Echinoderms - Coggle Diagram

- - - - Respire through anus
      - Evisceration, ejection of entire digestive system high regenerative ability
      - Both bilateral and radial symmetry
      - Separate mouth and anus
  - - - Aristotles lantern, 5 segmented beak, grinding food.
      - Teste interlocked with exoskeleton where spikes
      - Radial in adult stage
      - Mouth travels to anus, which sits atop
      - Coiled internals
      - Nerves sit outside internal system
- - - - Thick arms merge into centre
      - Arms full of organs
      - Closed circulatory, hydrocirculatory
      - Ampullae
      - High regeneration of limbs
      - Non connected nervous system
      - Cardiac stomach, separate mouth and anus
      - Predatory
  - - - Thin arms, high sensory ability (chemoreception, photoreception, mechanoreception). Highly mobile limbs
      - Central Disc, full of organs
      - They only have a mouth, no anus
      - Active predators