Whole blood is the complete form of blood that includes all its components: red blood cells, white blood cells, platelets, and plasma. It is typically collected from donors and can be used for various medical purposes, such as transfusions and research. Whole blood is essential for treating patients with severe injuries, surgeries, or certain medical conditions. In medical settings, whole blood can be separated into its components for specific treatments. For example, red blood cells are often used to treat anemia, while plasma can help patients with clotting disorders. The collection and use of whole blood are regulated to ensure safety and effectiveness.