Here's why:
* Protection: Both the cell membrane and human skin act as a barrier, protecting the cell/body from the external environment.
* Selectively permeable: The cell membrane and skin both control what enters and leaves. They allow some substances to pass through while blocking others.
* Structure: Both have a structural component. The cell membrane has a phospholipid bilayer, while the skin has layers of epithelial cells.
* Regulation: Both can regulate the passage of substances through them, responding to various stimuli.
While the cell membrane is analogous to skin, it's important to remember that it is much simpler in structure and function compared to the complex organ that is human skin.
