Cell Membrane Definition For 7th Grade. The cell membrane is the outer edge of the cell and forms the boundary between the inside of the cell with all of its organelles and the extracellular matrix. Process in which one cell divides into two cells, each of which is identical to the original cell:

It is composed of a thin layer of protein and fat. Animal cells don't have cell walls, but they do have cell membranes, which help control which substances are allowed to enter and exit a cell. The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell.it separates the cytoplasm (the contents of the cell) from the external environment.

The cell membrane is the outer covering of a cell within which all other organelles, such as the cytoplasm and nucleus, are enclosed.

Cell membrane is a protective covering that acts as a barrier between the inner and outer environment of a cell (in animals). In this unit on cell theory and cell structure and functions, 7th grade students will be able to recognize the different levels of organization in plants and animals including cells, tissues, organs, organ systems, and organisms (7.12c). By structure, it is a porous membrane (with pores) which permit the movement of selective substances in and out of the cell. The membrane that controls what substances come into and out of a cell.