Bacteria are removed from lymph and blood in the:A.spleen and bone marrow, respectively.B.lymph nodes and spleen, respectively.C.bone marrow and lymph nodes, respectively.D.lymph vessels and thymus, respectively.

The correct answer is B. Lymph nodes and spleen, respectively.

Lymph nodes are small structures that work as filters for harmful substances and contain immune cells to fight infection. They are key to the body's immune response and often swell in reaction to infection and other causes.

The spleen, on the other hand, filters blood. It removes old and damaged red blood cells, and also holds a reserve of blood in case of hemorrhagic shock. It also synthesizes antibodies, removes bacteria and, in fetuses, produces red blood cells.