<p><strong>Fig. 2.7. </strong>Cell membranes are made of a phospholipid bilayer with embedded proteins.&nbsp;This diagram shows the phospholipid hydrophobic tails pointed toward each other and the hydrophilic heads pointed outward.</p>

Fig. 2.7. Cell membranes are made of a phospholipid bilayer with embedded proteins. This diagram shows the phospholipid hydrophobic tails pointed toward each other and the hydrophilic heads pointed outward.

Image courtesy of Mariana Ruiz, Wikimedia Commons