Bio122/L Porifera

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Author:
jgascaco
ID:
208022
Filename:
Bio122/L Porifera
Updated:
2013-03-18 19:27:49
Tags:
Porifera Phylum Invertebrate Zoology bioe 122
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Description:
Terms for phylum Porifera
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  1. Parazoa
    • "along side"
    • group which contains Porifera
    • animals that lack "true tissues"
    • Ablastic
  2. Porifera
    • "pore bearer"
    • sponge
    • filtering organisms
    • loosely jointed cells
    • lack organ systems
    • food injested via phagocytosis
    • asexual and esxual
  3. Phagocytosis
    cells are directly involved in digestion by absorbing nutrients
  4. POM and DOM
    • POM: particular organic matter
    • DOM: dissoved organic matter
  5. pinacoderm
    group of pinacocytes that forms the outer skin
  6. Choanocyte chamber
    • Leucon sponges
    • increases surface area
    • site of digestion
  7. Rules of Digestion in Leucon Sponges
    • if food is 
    • > 50 um - wont fit in porocyte
    • < 50 um but > 2- 3 um then amoebocyte will phagocytize the particle and transport it to apopyle
    • anything between 2-3 um fin in chamber and are digested or released
  8. mesohyl
    • "middle wood"
    • gelatinous region in between the two layers of a sponge
  9. porocytes
    • "pure cell"
    • channel made by rolling pinacocyte
    • always opened
  10. leucon
    • no/reduced spongiocoel
    • little mesohyl
    • choanocyte chambers
  11. spongin
    collogen protein that forms exoskeleton in Porifera
  12. prosopyle
    • "front gate"
    • anterior side of choanocyte chamber
  13. amphiblastula
    • Porifera larvae
    • partially hollow larvae
  14. choanoderm
    • group of choanocyte
    • draws current into projections 
    • brings in filaments to be digested by cell membrane
  15. pinacocyte
    • "platter cell"
    • individual cells that forms outer skin
  16. spongicoe
    The central cavity of sponges that water passes into
  17. Sclerocytes
    • skeletal elements
    • example: spicules
  18. spicules
    • defensive spikes
    • can be CaCOor SiCO3
    • 2 types: megascleres (large) and microscleres (small)
  19. ascon
    • "sack"
    • simplest sponge design
    • aquiferous system
    • totipotency
  20. Ascon BP
    • large spongicoel
    • choanoderm lining inside 
    • Mesohyl between spongiocoel and pinacoderm
    • few porocytes in between some pinacocytes
    • oscule on top
  21. totipotent
    cells capable of transforming into other cells
  22. incurrent canals
    • made of pinacoderm
    • particles from contrachile go in
  23. apopyle
    • "backgate"
    • posterior side of choanocyte chamber
  24. parenchymella
    • Porifera larvae
    • solid flagullated larvae
  25. ostia
    pores
  26. choanocyte
    • "collar cell"
    • inner skin that forms coandoderm
  27. oscule/osculum
    mouth of sponge
  28. ostium
    small opening or orifice
  29. sycon
    • sponge type
    • convoluted choanoderm
  30. Sycon BP
    • oscule
    • pinacoderm
    • contrachule
    • incurrent canals
    • radial canals
    • convoluted choanoderm
    • mesohyl
    • spongiocoe
  31. amoebocyte/archeocyte
    • Cells within the mesohyl of sponges
    • digest food and carry nutrients to other cells/sponges
    • form skeletons in sponges
  32. excurrent canals
    where food leaves choanocyte chamber and leaves oscule
  33. gemmule
    • "cyst"
    • internal buds found in asexual sponges
    • response to hostile env
  34. Porifera classes
    • Calcarea: sponges with CaCO3 spicules
    • Sclerospongidae: sponges with SiCO3 spicules with CaCO3 base
    • Demospongiae: Leucon sponge with 6-ray SiCO3 spicules

    subphyllum - Hexachinellida: glass sponges with 6-ray SiCO3 spicules and syncytal tissues
  35. Porifera Larvea
    • sexual: Coeloblastula, Parynchymelia, Trichemelia
    • asexual:gemmule
  36. radial canal
    the u-space between the spongiocoe and choanoderm

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