2024-11-12T01:40:06+03:00[Europe/Moscow] en true <p>Phylum porifera </p>, <p>Osculum </p>, <p>Ostia </p>, <p>Holdfast </p>, <p>Mesohyl </p>, <p>Choanocytes</p>, <p>Crystalline spicules </p>, <p>Monoactin, Triactin, Hexactine </p>, <p>Spongin fibers</p>, <p>Collencytes and lophocytes </p>, <p>Spongocytes </p>, <p>Archaeocytes </p>, <p>Sclerocytes </p>, <p>Pinacocytes </p>, <p>Porocytes </p>, <p>Choanocytes</p>, <p>Asconoid</p>, <p>ostia, spongocoel, osculum </p>, <p>incurrent canal, ostia, radial canal, spongocoel, osculum </p>, <p>Leuconoid </p>, <p>Incurrent canal, flagellated chamber, excurrent canal, oscula</p>, <p>Budding </p>, <p>Calcarea</p>, <p>Demospongiae </p>, <p>Venus flower basket, Euplactella sp. </p>, <p>Hexactinellida </p> flashcards
zool 4.1

zool 4.1

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  • Phylum porifera

    variable shapes, asymmetrical/radial

  • Osculum

    large opening, exit of water

  • Ostia

    entrance of water, pores

  • Holdfast

    root-like structure used by sponges to attach to substrate

  • Mesohyl

    - middle layer - gelatinous - non-cellular matrix

  • Choanocytes

    cells to acquire food

  • Crystalline spicules

    - calcareous (CaCO3 ), siliceous (SiO2 ) - hard needle-like structures, skeletal elements

  • Monoactin, Triactin, Hexactine

    1 rayed, 3 rayed, 6 rayed crystalline spicules

  • Spongin fibers

    flexible fibers made of protein (a modified type of collagen protein)

  • Collencytes and lophocytes

    secretes collagen

  • Spongocytes

    secretes spongin fibers

  • Archaeocytes

    amoeboid cells (amoebocytes) - totipotent cells (can differentiate to different types), do many functions (facilitating digestion & feeding)

  • Sclerocytes

    secretes spicules

  • Pinacocytes

    - cells forming the pinacoderm (= epidermis), outer covering - thin, flat cells (= epithelial) - may phagocytize large food particles

  • Porocytes

    tubular cells forming the pores of asconoid sponges

  • Choanocytes

    flagellated collar cells (distinguishing characteristic) that generate water current

  • Asconoid

    Shortest water route, simplesrt

  • ostia, spongocoel, osculum

    succession of asconoid

  • incurrent canal, ostia, radial canal, spongocoel, osculum

    Syconoid succession

  • Leuconoid

    most complex - many flagellated chambers

  • Incurrent canal, flagellated chamber, excurrent canal, oscula

    Succession of Leuconoid

  • Budding

    asexual reproduction of poriferans

  • Calcarea

    brittle sponge, calcareous monoaxon spicules, 3 canal system

  • Demospongiae

    bath sponge, siliceous spicules (not 6 rayed), some have spongin fibers, LEUCONOID CANAL SYSTEM

  • Venus flower basket, Euplactella sp.

    with male & female shrimps locked inside

  • Hexactinellida

    glass sponge, 6 rayed spicules, Leuconoid system