Spleen, which grows in the upper left abdomen of human body, is dark red and about the size of a fist. When the child is still in the womb, the spleen is a unique hematopoietic "factory" in the body, responsible for making blood for the fetus. However, after birth, the bones in the human body continue to grow, and the bone marrow in the bones has become a brand-new hematopoietic "factory", which almost covers all hematopoietic work, and the status of the spleen has plummeted. It has long been considered as a blood "warehouse" in the body, which only plays the role of storing blood, with or without it, but this is not the case.

It was not until the surgery of organ transplantation in modern times that people fully understood the function of spleen in human body. In the past, patients transplanted other people's healthy organs, because they accepted things that did not belong to their own bodies, and rejection often occurred. Many lymphocytes and immune defense antibody substances in the body will "interfere" with foreign organs and try their best to drive them away. Of course, organ transplantation is to save the patient's life, and doctors will not allow this rejection to continue to develop and try their best to prevent it from happening. Therefore, in organ transplantation, doctors either use drugs to control or simply remove the spleen. Splenectomy can indeed reverse the adverse reactions of rejection. Why is this? Because the spleen not only stores a large number of lymphocytes, but also produces a large number of immunoglobulins, which are the raw materials for making antibodies against transplanted organs. After splenectomy, a considerable number of lymphocytes are lost in the body, and the production of antibodies is also significantly reduced, which is very beneficial to protect transplanted organs and prevent rejection.

Spleen is the largest lymphatic organ in human body.

For the success of organ transplantation, splenectomy is a treatment method of "losing your car to protect your handsome". But on the other hand, it also clearly shows that the spleen plays an important "defense" role in the human body, mainly to improve the human body's resistance. Many studies have found that people whose spleen has been removed will greatly reduce their body resistance and are prone to various infections, and these infections are fierce and have a high mortality rate.

It can be seen that the human spleen is not a useless organ. Doctors are very cautious about splenectomy. Even if the spleen is ruptured due to trauma, they will try to repair it unless they have to, in order to keep this "guardian" of the human body.