Assertion: membrane's lipid | /r/LocatedNear | cell
Facets:
Source sentences:
text: The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell and separates the cytoplasm (the contents of the cell) from its surrounding environment.
text: Based on these calculations, he found that the layer of lipids surrounding the cell is 3.3 mm thick (Fricke, 1924).