What are the examples of pinocytosis?

There are several different examples of pinocytosis being used among cells. One example occurs in the microvilli of the small intestine. The microvilli are able to absorb nutrients from the lumen of the gastrointestinal tract. Another example is that unicellular organisms such as amoeba, are able to uptake water and dissolved nutrients. Pinocytosis is also seen in cells in the ducts of kidneys during the formation of urine in the body. Additionally, pinocytosis occurs in most cells of the body to recycle components of the cell membrane and to retain the size of the cell. For example, pinocytosis is used in epithelial cells to take in the fluid region of the blood at the capillary surface. The formed vesicles then transport across other capillary cells and release the fluid into surrounding tissue.