Phagocytosis is an important aspect of the Immune System that causes a foreign object to be found and destroyed by several cellular structures.

The overtaking or engulfing of the solid object, molecule, or particle will become a cellular object referred to as a phagosome. It may also be referred to as a vacuole.

Several molecules initiate activation and attachment to the foreign object by Macrophages and Neutrophils. Once engulfed, the foreign object becomes a phagosome.

It then becomes attached and fuses with the lysosome component to a cell. Digestive enzymes within the cellular structure,  cause a degradation of the phagosome. The result is cellular death or also called Apoptosis

Take a look at an InterActive explanation of this process below: