Distinguish between intracellular and extracellular digestion.

(N/A) $\rightarrow$ Intracellular digestion: When food particles are taken into the cell and digestion occurs within the cell,it is called intracellular digestion. Example: Members of Phylum $Porifera$.
$\rightarrow$ Extracellular digestion: When digestion occurs outside the cells,typically within a specialized cavity or lumen where digestive enzymes are secreted,it is called extracellular digestion. Example: Most higher animals including humans.