First slide
Classification of Animals
Question

Both extracellular and intracellular digestion occur in

Easy
Solution

Digestion is exclusively intracellular in protozoans (e.g., Amoeba) and sponges (e.g., Sycon, Euspongia). Both intracellular and extracellular digestion occurs in cnidarians (e.g., Hydra) and ctenophores (e.g., Pleurobrachia). Digestion in annelids (e.g., Pheretima) is extracellular.

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