Phagocytosis's the cellular process of phagocytes and protists of engulfing solid particles by the cell membrane to form an internal phagosome, which's a food vacuole, or pteroid. Phagocytosis's a specific form of endocytosis involving the vesicular internalization of solid particles, such as bacteria, and's therefore distinct from other forms of endocytosis such as pinocytosis, the vesicular internalization of various liquids. Phagocytosis's involved in the acquisition of nutrients for some cel… (More on Phagocytosis)