what is an animal cell membrane?
<answer> A fluid mosaic structure which is composed of a phospholipid bilayer and other important macromolecules such as proteins. <context> Parts [edit]. Cell Membrane: The cell membrane is a fluid mosaic structure which is composed of a phospholipid bilayer and other important macromolecules such as proteins. The cell membrane separates the cell from the environment and allows the movement of materials in and out of the cell. Animal Cell. Cytoplasm: the liquid within the cell where the different organelles are found. It is here where many functions occur. Including cell division and glycolysis.