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: Sarcophagus refers to the carved, generally stone case in which the linen-wrapped mummy was placed. The gilded sarcophagus of King Tut with painted face depicting the boy king is probably the best known of the Egyptian sarcophagi. Sarcophagus can be used to refer to a coffin -- especially one of stone. The plural of sarcophagus is usually sarcophagi, although it is sometimes written as sarcophaguses. Sarcophagus comes from the Greek for flesh-eater.