Cell surface structures are specialized features found on the outer membrane of cells. These structures include proteins, lipids, and carbohydrates that play crucial roles in communication, protection, and interaction with the environment. They help cells recognize each other and can facilitate the transport of substances in and out of the cell. One important type of cell surface structure is the glycocalyx, a fuzzy-appearing coating made of carbohydrates that helps with cell recognition and adhesion. Additionally, microvilli are tiny projections that increase the surface area of cells, enhancing their ability to absorb nutrients. Together, these structures contribute to the overall function and health of cells.