MICROANATOMY

Detailed explanation-1: -The correct option is a) removes worn-out blood cells. The spleen plays various roles in the body. The principal role is filtering blood to maintain a good balance of body fluids, as well as to remove old and worn out red blood cells.

Detailed explanation-2: -The splenic cords in the red pulp in the spleen serve as important reservoirs for large quantities of macrophages and other phagocytic white blood cells called monocytes.