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P

Phagocytosis

The process by which a cell—often a phagocyte or a protist—engulfs a solid particle to form an internal compartment known as a phagosome.


Pinocytosis

This a mode of endocytosis in which small particles are brought into the cell, forming an invagination, and then suspended within small vesicles. Pinocytosis is used primarily for the absorption of extracellular fluids.