Parenchyma cells, the most abundant type of cell in many plants, are relatively unspecialized plant cell types. They stay alive when mature and usually only have primary cell walls, which are flexible and thin. They perform most of a plant’s metabolic functions including photosynthesis, aerobic respiration, and the synthesis and storage of food and other organic products. Parenchyma cells can divide and differentiate into other plant cell types under certain conditions, such as injury repair. Parenchyma cells are located throughout the plant, and are very abundant in a plant’s leaves, such as those pictured here.