How are poriferans classified
Regarding digestion how are poriferans classified?
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Sponges are distinct from other animals as they exist only in intracellular digestion. They do not contain a digestive system nor do they liberate digestive enzymes in the spongocoel to cause extracellular break-down of the nutrients.
State some of the difference between the brain and cerebrum? Specify the main parts of these structures?
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