spongocoel

anatomy

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July 14, 2026

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The spongocoel is the internal cavity of a sponge that expels water through an opening called the osculum. This cavity is a crucial part of the sponge's water-current system, which circulates water to bring food and oxygen to the animal, and to remove waste products.12

Sponges are filter feeders, capturing food particles like bacteria and organic debris from the water using specialized cells called choanocytes. The arrangement of choanocytes and canals can vary, leading to different types of water-current systems, such as ascon, sycon, and leucon. In the leucon type, water passes through a spongocoel via excurrent canals. Sponges lack respiratory organs; oxygen is absorbed directly from the water.324

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sponge
Water-current system
…into the central cavity, or spongocoel, and leaves by way of an osculum. In most syconoid sponges (e.g., Scypha) the radial canals are bordered by incurrent canals through which passes the water entering the pores; other openings (prosopyles) allow water into the choanocytes, from which it passes directly into the…
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…into the central cavity, or spongocoel, and leaves by way of an osculum. In most syconoid sponges (e.g., Scypha) the radial canals are bordered by incurrent canals through which passes the water entering the pores; other openings (prosopyles) allow water into the choanocytes, from which it passes directly into the…
Read More