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extra cellular

Extra-cellular digestion

Extra-cellular digestion is a process where saprobionts feed by secreting enzymes through the cell membrane onto the food. The enzymes catalyse the food into molecules small enough for them to be phagocytosed. Since digestion is done outside the cell, it is said to be extra-cellular.

Extracellular digestion is a form of digestion found in all saprobiontic annelids, crustaceans, arthropods and chordates, including vertebrates. It takes place within the lumen of the digestive system, and the resulting nutrient molecules are transferred into the blood or body fluid.

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