True or false: The spleen is an excretory organ.

The spleen is classified as part of the lymphatic system and has several important functions, but it is not considered an excretory organ. Its primary roles include filtering blood, recycling iron from hemoglobin, and serving as a reservoir for blood. While it does play a part in the removal of old or damaged red blood cells, this action is more about recycling and maintenance of blood components rather than excretion, which typically involves the elimination of waste products from the body. Therefore, stating that the spleen is an excretory organ is incorrect, making the statement false.