Chapter Three: Cell biology
The cell membrane is the thin nearly invisible structure that surrounds
the cytoplasm of the cell. In this section we will talk about its structure
and its function. In the image at the left you can see that it is a continuous membrane
that completely surrounds the cell.
It also connects the the endoplasmic reticulum, and the nuclear membrane. In the
image below we have colored the membrane to highlight its composition. The yellow
represents the phospholipids. The purple represents the membrane proteins (for more
on the structure click next).