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.
Definition - What does Heptane mean? Heptane is a water-insoluble hydrocarbon obtained by fractional distillation of petroleum characterized by its petrol-like odor and colorless nature. It is used in the manufacturing of paint and coating additives, adhesives, sealants, chemical intermediates and formulation solvents in industrial and consumer use.