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.
Mesenchyme is a type of animal tissue comprised of loose cells embedded in a mesh of proteins and fluid, called the extracellular matrix.inot found these cells in the context of histological studies of mesoderm. He understood the loose, mobile cells of mesenchyme as primitive representatives of the mesoderm, but did not consider these cells as a type of tissue.