T and B cells. Lymphocytes originate from stem cells in the bone marrow; these stem cells divide continuously, releasing immature lymphocytes into the bloodstream. Some of these cells travel to the thymus, where they multiply and differentiate into T lymphocytes, or T cells.
Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air, oils, greases, bacteria and water makes it useful for food packaging. Cellophane is in many countries a registered trade mark of Innovia Films Ltd based in Wigton, Cumbria, United Kingdom.
cellophane(n.) a transparent paper-like product made of regenerated cellulose, produced in sheets and rolls, which is impervious to moisture and germs, and which is used to wrap candy, cigarettes, and a wide variety of other products for distribution and retail sale; as, a pack of cigarettes in a cellophane wrapper.