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.
Fig. 246 Parenchyma . Transverse section of cells. a tissue composed of parenchyma cells which are thin-walled âgeneral purposeâ plant cells that often have a packing function. Parenchyma cells remain alive at maturity and can become meristematic, as in INTERFASCICULAR CAMBIUM (see SECONDARY THICKENING). See Fig. 246 .