What is the result of the blockage of the flow of lymph?

A. The thymus gland is involved in the maturation of T-cells, a type of white blood cell, but it does not remove worn-out blood cells or serve as a blood reservoir.
B. The liver has various functions, including detoxification, protein synthesis, and storage of glycogen, but it is not the primary organ for removing worn-out blood cells or serving as a blood reservoir.
C. The spleen is a large lymphatic organ that filters blood, removes worn-out blood cells, and serves as a reservoir for blood. It also plays a role in immune function by filtering pathogens from the blood.
D. Interstitial spaces refer to the fluid-filled spaces between cells in tissues and are not an organ involved in blood cell removal or storage.

A. Interferon is a type of protein produced by the body in response to infections, particularly viral infections. It is not related to allergens.
B. Macrophage is a type of white blood cell that engulfs and digests pathogens, dead cells, and other debris. It is not an allergen.
C. An allergen is a substance that triggers an allergic reaction. It is considered a type of antigen—a foreign substance that the immune system recognizes and reacts to, often causing symptoms like inflammation, swelling, or itching in allergic individuals.
D. Antibody is a protein produced by B cells that binds to specific antigens, but it is not an allergen.