Question

In three to five sentences, explain why animal cells do not require a cell wall or a
central vacuole for their functions.

Answer 1

Animal cells rely on a flexible plasma membrane plus an internal cytoskeleton and an external extracellular matrix for shape and mechanical support, so a rigid cell wall is unnecessary and would interfere with cell movement and processes like phagocytosis. Animals also maintain a tightly regulated internal fluid environment (blood, interstitial fluid, kidneys) so they do not need a large central vacuole to control water balance or store metabolites. Smaller vesicles and lysosomes perform storage, waste processing, and transport functions that a central vacuole provides in plant cells. Together these features let animal cells be more flexible and motile while still meeting structural and homeostatic needs.