Detailed diagram of a plant cell, and information on the roles and function that the specific plant cell parts play. The onion cell which is a typical plant cell, has a distinct cell wall as its outer boundary and just within it is the cell membrane. The cells of the human cheek have an outer membrane as the delimiting structure of the cell. Plant Cell Definition, Structure, Function, Diagram & Types Plant cells are eukaryotic cells with a true nucleus along with specialized structures called organelles that carry out certain specific functions. Vacuoles: Often the largest organelle in a plant cell, bounded by a single membrane called tonoplast. Function: Vacuoles play a major role in autophagy, maintaining a balance between biogenesis (production) and degradation of many substances and cell structures.
