Question

What is the function of vacuoles in animal cells?

Answer 1

A vacuole is a membrane-bound sac that plays roles in intracellular digestion and the release of cellular waste products. In animal cells, vacuoles are generally small...
http://www.cellsalive.com/cells/vacuole.htm
http://en.wikipedia.org/wiki/Vacuole#Animals

Answer 2

n animal cells, vacuoles perform mostly subordinate roles, assisting in larger processes of exocytosis and endocytosis.
Animal vacuoles are smaller that their vegetable counterparts but also usually greater in number.[13] There are also animal cells that do not have any vacuoles.[14]
Exocytosis is the extrusion process of proteins and lipids from the cell. These materials are absorbed into secretory granules within the Golgi apparatus before being transported to the cell membrane and secreted into the extracellular environment. In this capacity, vacuoles are simply storage vesicles which allow for the containment, transport and disposal of selected proteins and lipids to the extracellular environment of the cell.