Osculum

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Construction plans of the sponges:
A. Ascon, B. Sycon, C. Leucon
1) suboscular space 2) oscula
4) flagellum chambers 5) 6) pores

The Osculum (plural: Oscula) is the main opening of sponges (Porifera), through which water that has been tumbled in by porocytes (wall pores) is expelled. The sponge also excretes metabolic products through the osculum .

literature

  • Volker Storch, Ulrich Welsch: Short textbook of zoology . 7th edition. Gustav Fischer, Stuttgart, Jena, New York 1994, ISBN 3-8274-1399-0 , pp. 402 .