Digestion

Archaeocytes are amoeboid and can change into all other types of sponge cells. In addition, they also ingest and digest food which are caught by the choanocytes. They transport the nutrients to other sponge cells. Tiny food particles stick to the collar cell, where they may be digested. If the collar cell doesn't digest the food, they pass it on to the amebocytes. When food particles are digested, amebocytes deliver digested food to other parts of the sponge. Digestion of sponges is intracellular, takig place inside cells.