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.
Two types of sclerenchyma cells exist: fibres and sclereids. Their cell walls consist of cellulose, hemicellulose and lignin. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation.Sclerenchyma fibres are of great economic importance, since they constitute the source material for many fabrics (e.g. flax, hemp, jute, and ramie).arenchyma forms the filler tissue in the soft parts of plants. Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra structural support, particularly in regions of new growth. Sclerenchyma cells have thick lignified secondary walls and often die when mature.