The outer edge of a plant cell is called the cell wall, while the outer edge of an animal cell is called the cell membrane (also known as the plasma membrane).

Here's a breakdown of each:

Plant Cell Wall:

* Structure: A rigid, tough layer made primarily of cellulose, a complex carbohydrate.

* Function: Provides structural support and protection to the cell, helps maintain its shape, and prevents bursting due to osmotic pressure.

* Additional Notes: The cell wall is found outside the cell membrane and is unique to plant cells.

Animal Cell Membrane:

* Structure: A thin, flexible layer made up of phospholipids and proteins.

* Function: Controls what enters and leaves the cell, acts as a barrier between the cell's internal environment and the external environment, and helps maintain cell shape.

* Additional Notes: The cell membrane is also found in plant cells, but it's located beneath the cell wall.

Let me know if you'd like to know more about either of these structures!