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UP CPMTUP CPMT 2010Cell : The Unit of Life
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The term plasma membrane was originally used by Nageli and Cramer (1855) for the membranous covering of the protoplast. The same was named plasmalemma by Plowe (1931). Plasmalemma or plasma membrane was discovered by Schwann (1838). Membranes also occur inside the cytoplasm of eukaryotic cells as covering of several cell organelles like nucleus, mitochondria, plastids, lysosomes, Golgi bodies, peroxisomes, etc.