Usher's Ex-Wife Posts Photo of Son, Usher Raymond V, Recovering After Pool Accident. R&B star Usher's ex-wife has posted a photo on Instagram of herself with her son, Usher Raymond V, who was recovering in a hospital after a poolside accident at his father's Atlanta home earlier this week.
Parenchyma cells are the biochemistry machines of the plant. They are usually described as the typical plant cell, because they are not very specialized. These cells are commonly found in leaves, roots, and stems, usually having a spherical shape with only primary cell walls and highly functional cytoplasm. Source.
Dedifferentiated parenchyma cells produce Cork cambium. It lies in the outer part of the cortex (fig.1). It produces cork cells (phellem) to the exterior and replace the epidermis. It also produces phelloderm to the interior. As cork cells mature their cell walls secrete a waxy substance called suberin.