Permeable layer
membrane
It Is Basically Cells
lipids.
The answer is proteins.
cell membrane
The Cell Membrane forms the outside boundary that separates the cell from its environment.
Cytokinesis
The cell membrane is a semi-permeable membrane that forms a boundary between the cell and the external environment. The vacuole is the storage area within the cell.
Cytoplasm
In cells without a cell wall, the outside boundary that separates the cell from its environment is formed by the cell membrane or plasma membrane. This phospholipid bilayer regulates the passage of molecules in and out of the cell, allowing for selective permeability.
Cell membrane
While plant cells have a cell wall, animal cells do not. Only lower plant forms have centrioles, while all animal cells do. Plant cells have chloroplasts, but animal cells don't. Plant cells also have plastids. They have a cell wall and membrane, but animal cells only have the membrane.