The cell membrane is a membrane-like structure that all cells have, and the main component of the cell membrane is composed of a phospholipid bilayer structure. In the phospholipid bilayer structure, there are also some glycoproteins, so the main components of the cell membrane are phospholipids and glycoproteins. The cell membrane is the boundary membrane where the cell makes contact with the outside world and exchanges substances. Only with the structural integrity of the cell membrane can the cell function maintain normal operation; if the cell membrane is damaged, various changes will occur in the cell, for example, in some patients with hemolytic anemia, it is due to the abnormal cell membrane structure that leads to the occurrence of hemolytic anemia. In addition, in addition to maintaining the integrity of the cell membrane, the cell structure must also have intact organelles and an intact nucleus for the cell to be able to maintain normal physiological functions. Some special cells do not have a nucleus or organelles due to evolutionary development, the most common being red blood cells and platelets, which is a result of long-term evolutionary development.