blood ; It is a liquid whose only source is human and necessary for life. The blood-forming organ in adults is the bone marrow. It is a life-saving liquid because its only resource is human and it has no backup that can be replaced when needed. In developed countries, blood donation is considered as a social responsibility, and blood donations are made regularly with the thought that one day they will need blood. In our country, blood and other organ donation is not yet at the desired level and stability. donating blood; It strengthens the immune system of the donor, as it physically stimulates the bone marrow and ensures that young blood cells are made in the bone marrow and mixed with circulation. When the blood donor thinks that he has saved another person’s life by performing this task, he feels a psychological relief.