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.
This root word means 'cellular tissue.' Parenchyma is the most common form of tissue in plants and provides a variety of functions, including the storage of food and water. Collenchyma tissue helps support young stems and roots. Lastly, sclerenchyma tissue provides rigid support and protection for the plant stem.