HealthGlobal issuesWhat does the spleen do?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHealthGlobal issuesJörg Gero Grüner10/14/2024October 14, 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.https://p.dw.com/p/4lf9lAdvertisement