Why do Leuconoid sponges get bigger than Syconoid sponges? 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 internal cavity and out of it through the osculum. Sponge feeding is critically dependent on several specialized cells within the organism including the following: choanocytes, amoebocytes, and porocytes. There are three different body plans found among sponges: asconoid, synconoid, and leuconoid. Leuconoid sponges lack a spongocoel and instead have flagellated chambers, containing choanocytes, which are led to and out of via canals. During their development, syconoid sponges pass through an asconoid stage. Syconoids do not usually form highly branched colonies as asconoids do. What is the difference between asconoid syconoid and Leuconoid sponges? The main difference between asconoid and syconoid body plans is that syconoid sponges have a row of tiny chambers, called radial canals, within their tissue that house their choanocytes. What is the difference between the asconoid body plan and the syconoid body plan?
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