Fabrics The blood also may donate an extraction or only some of its components. With the body recovers before apheresis donated and what can be done more often. On the other hand, is a longer process and uncomfortable. The whole blood donations, is usually separated into its components (plasma, platelets, red cells, etc) to use in most treatments. The cells that compose it have different shelf life and increases the separation time can be kept. The donated bone marrow through a process similar to apheresis, but before the process was more aggressive. The donor is part of a database and is required when a patient is compatible with it. Although there is no obligation to donate when they warned, do not usually reject the request.