Phagocytosis. This involves the complete engulfing of a extracellular particle or cell to form a intracellular phagosome. The phagosome then fuses with a lysozome to form a phagolysozome. The lysozymes in the phagolysozome digest the particle or cell (this case Paramecium). The other type of endocytosis is called pinocytosis.
3 mins* (3200 m/ 24 mins)= 2400 m.
Barbara can walk 2400 m in 3 mins~