what is the difference between the two processes known as phagocytosis and pinocytosis?

Phagocytosis and pinocytosis are two types of endocytosis, which is the process by which cells take in substances from outside the cell by engulfing them in a vesicle. The main difference between phagocytosis and pinocytosis is that phagocytosis is the ingestion of comparatively large solid particles, like bacteria and amoeboid protozoans whereas pinocytosis is the ingestion of liquid into the cell by budding a small vesicle from the cell membrane1.

Phagocytosis involves the formation of a phagosome, while pinocytosis involves the formation of a pinosome. Phagocytosis requires the participation of enzymes called hydrolytic enzymes, while pinocytosis does not. Phagocytosis is a rapid process that occurs in response to specific stimuli, while pinocytosis is a continuous process2.

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