Extracellular digestion is digestion that occurs outside cells, most usually outside the actual organism. So, while in humans digestion occurs inside the digestive system, in organisms such as fungi and some insects, the organism secretes digestive enzymes out onto food and then absorbs the broken down molecules. Fungi do this directly through the cell walls of their hyphae, insects do it by slurping up the digested matter through a proboscis.
