Cell Membrane Definition For Kid. Its basic job is to separate the inside of cells from the outside. When molecules are evenly distributed, then an equal number of molecules are entering and leaving the cell.
Cell membrane is a protective covering that acts as a barrier between the inner and outer environment of a cell (in animals). The cell membrane is a thin but tough wall surrounding the cell. After the cell nucleus has reformed, the nucleoplasm fills the space again.
Proteins and lipids are the major components of the cell membrane.
Bacteria, fungi and plants have cell walls. Cell membranes according to cell theory, cells are the main unit of organization in biology. The thin outside layer that surrounds the cytoplasm of a cell and controls the movement of materials into and out of the cell. In the human body, food we have digested reacts with oxygen in the mitochondria to make energy for the cell.
