BIO 2135 Chapter DigiDiv: Porifera Keywords
10 Feb 2017
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Document Summary
Asconoid: consists of a central choanocyte, lined spongocoel that opens to the outside directly through the osculum, water enters spongocoel after passing through dermal pores. Syconoid: intermediate in complexity spongocoel no longer lined with choanocytes, they are now located in radial canals that open to spongocoel through apopyles water enters the radial canals through prosopyles and exits through an osculum. Leuconoid: choanocytes are found in chambers, no spongocoel, water enters incurrent canals to the prosopyles and exits the chambers through apopyles, excurrent canals, osculum. Archeocyte: cells capable of differentiating into a variety of cell types. Amebocyte: a cell that moves using amoeboid movement involved in transporting materials, defending against invading organisms, cleaning up debris. Choanocyte: collar-shaped cell (microvilli form the collar), flagella are responsible for generating water current into sponge. Pinacocyte: flattened cells that cover the surface of a sponge. Porocyte: cell in asconoid sponge with a hole through the center so that water can enter.
