Complex sentence: Pinocytosis is used primarily for the absorption of extracellular fluids (ECF), and, in contrast to phagocytosis, generates very small amounts of ATP from the wastes of alternative substances such as lipids (fat).
Split into simpler sentences: Pinocytosis is used primarily for the absorption of extracellular fluids (ECF). In contrast to phagocytosis, it generates very small amounts of ATP from the wastes of alternative substances such as lipids (fat).