What are the 3 functions of the spleen?

1)Serves as a blood reservoir storing 500ml or 1 pt of blood 2)stores lymphocytes, monocytes and plasma cells 3)The white blood cells in the lining of the hollow cavities within the spleen engulf and destroy foreign materials as well as damaged erythrocytes that pass through the spleen 4)It produces erythrocytes after birth(Can produce erythrocytes after birth only in cases of extreme hemolytic anemia