Labels:brass | cd rom | scissors | vase OCR: Membrane Membr ane means kind skin. The cell membrane encloses subsi tance called cytoplasm which contains other subs tances that make up cell Cell membranes allow foodstuffs and essential chemicals to enter and feed the cell Membranes also let out Waste materials the cell produces. Human cell membr anes are around 0.00001mm thick. membi
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