The region between the nuclear envelope and the plasma membrane is the cytoplasm. Within the cytoplasm of a eukaryotic cell are many different membrane bound organelles including vacuoles. Animals, protists, fungi and plants are composed of eukaryotic cells. Vacuoles are large vesicles that are derived from the Endoplasmic reticulum and Golgi apparatus. They are membrane- bound sacs and serve many functions such as storage.
Animal cell vacuoles are much smaller and more numerous than plant cell vacuoles, because in plant cells, they store a great deal of water. If an animal cell performs phagocytosis, a food vacuole forms and fuses with a lysosome(containing enzymes) for furthering processing. This is an example of endocytosis where in this case, a small area of the plasma membrane sinks inward to form a pocket. Materials that were outside the cell(including nutrients) will be taken in as the pocket eventually deepens and pinches inward to form a vesicle. This transport vesicle will carry nutrients from the surroundings into the cell to become a food vacuole. Vacuoles are formed by the fusion of many of these vesicles and their size varies due to the needs of the cell.
In exocytosis, animal cells are able to transport proteins and lipid secretions from inside the cell because storage vacuoles can store, transport and dispose of these chemicals when they attach to the plasma membrane and release their contents to the extracellular environment.