Animal cells do not require a cell wall because they have a flexible plasma membrane that allows for various shapes and movements. The absence of a central vacuole is due to the fact that animal cells do not need to store water or nutrients in a central location, as they can obtain these necessities through other means such as eating and drinking. Instead, animal cells have smaller vacuoles that serve specific functions, such as storing waste or aiding in cellular digestion. Overall, animal cells have evolved different structures and mechanisms to support their functions without the need for a cell wall or central vacuole.
