What is the main function of the spleen?

The main function of the spleen is to filter blood and recycle iron. The spleen plays a crucial role in the immune system and helps maintain the body’s blood supply by removing old or damaged red blood cells from circulation. Specifically, it breaks down hemoglobin from these cells and recycles iron, making it available for the production of new red blood cells. This recycling process is important for preventing anemia and maintaining a healthy supply of blood cells.

In addition to its filtering role, the spleen also serves as a site for the immune response, producing lymphocytes and storing white blood cells that are essential in the body’s defense against infections. Understanding this central function helps highlight the importance of the spleen in overall health, particularly in relation to blood and immune system dynamics.