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LU4 PORIFERA - Coggle Diagram

- - - - central cavity of sponges
    - - gelatinous, non living layer material
    - - skin cells of sponges
    - - flagellated cells lining the spongocoel
    - - cells secreting spicules
    - - Amorphous, amoeboid cells which are important to the functioning of the sponges.
        
        titopotent: become any type of cell in the sponge
      - carry out phagocytosis
        
        digesting food particles
        
        storage digested food
        
        produce sperm and eggs
        
        eliminating waste
        
        develop into more specialized cells for secreting
        
        sclerocytes spicules, spongocytes spongin
    - - provide structural support and deter predators
      - maybe calcareous or cilica
  - - - epithelioid
      - mesohyl
      - Pinacoderm: outermost layer consist flattened contractile cells (pinacocytes)
        
        opening the sponges
        
        ostia
        
        water in
        
        osculum
        
        water out
- - - - generate current and maintain circulation within and through the sponge
      - capture food particles
      - capture incoming sperm for fertilization
- - - - spicules composed of calcium carbonate
  - - - thin-wall
      - cylindrical
      - Vase-shaped
      - large central atrium