Here's why:

* Food Vacuoles: These are membrane-bound sacs within a cell that store and digest food.

* Cytoplasm: This is the gel-like substance that fills the cell and contains all the cell's organelles (including the food vacuole).

When a cell engulfs a large food particle, the food vacuole can grow quite large, potentially taking up a significant portion of the cell's cytoplasm. This is especially true in single-celled organisms like amoebas, which rely heavily on phagocytosis (engulfing food particles) for their nutrition.