HealthGlobal issuesWhat does the spleen do?03:37This browser does not support the video element.HealthGlobal issuesJörg Gero Grüner10/18/2024October 18, 2024The spleen is a key component of the immune system. It filters old blood cells, bacteria, tumor cells out of the blood and breaks them down. The macrophages then get rid of them.Copy linkAdvertisement