It is used as a national identification number, tax payer number, social insurance number,driver's license number, for employment, etc. It is also commonly used as a customer number in banks, retailers, insurance companies, airlines, etc. Until the end of August 2013, the RUN was also used as the passport number.
The sclerenchyma cells are usually elongated, with tapering ends. Such cells are commonly described as sclerenchyma fibres. In some cases, the cells are shorter and irregular in shape. Such cells are commonly described as sclereids or stone cells.
Sclerenchyma cells in this view are fibers or xylem. Note the thick secondary cell walls and large lumens of the xylem cells to the right. Contrast these to the smaller diameter fiber cells with thick walls to the upper left.You should note most sclerenchyma cells are dead at maturity and therefore lack nuclei.clerenchyma cells in this view are fibers or xylem. Note the thick secondary cell walls and large lumens of the xylem cells to the right. Contrast these to the smaller diameter fiber cells with thick walls to the upper left. You should note most sclerenchyma cells are dead at maturity and therefore lack nuclei.