The outermost layer of the plant cell is the cell wall.
The cell wall is a rigid structure that provides support and protection to the plant cell. It is primarily made up of cellulose, a type of carbohydrate that forms a tough, fibrous network. This outer layer gives the plant cell its shape and helps to maintain turgor pressure, which is essential for plant rigidity and overall health.
Unlike animal cells, which have only a plasma membrane as their outer boundary, plant cells have both a cell wall and a plasma membrane. The presence of the cell wall allows plants to withstand various environmental stresses and is a key factor in their structural integrity.