Houses white blood cells (lymphocytes) involved in immunity. Picks up fluid leaked from blood vessels and returns to blood. Disposes of debris in the lymphatic system.

I think this should be the completed question.

picks up fluid leaked from blood vessels and returns it to blood. disposes of debris in the lymphatic stream. houses white blood cells (lymphocytes) involved in immunity. the immune response mounts the attach against foreign substances within the body.

The correct answer is LYMPHATIC SYSTEM

Explanation:

It is lymphatic system because Lymphatic system is a system that consists of vessels, cells, lymphoid organs which include bone marrow and thymus which form lymphocytes, cells that helps in body immunity or defence against pathogens and they carries excess fluid from the blood stream, filtering and cleansing the body front pathogens,and eliminating nitrogenous wastes and also the regulate acid base electrolytes in the body.