Fat globules and lymph combine to form a milky fluid called:

A. Chyle drainage is not a function of the spleen. Chyle, a milky fluid rich in fats absorbed from the intestines, is transported by the lymphatic system — specifically through structures like lacteals and the thoracic duct — not the spleen.
B. Blood filtration is a key function of the spleen, as it removes pathogens and debris from the blood.
C. Destruction of old red blood cells occurs in the spleen, which acts as a graveyard for aging or damaged red blood cells.
D. Blood storage is also a spleen function; it can store blood and release it in case of hemorrhage or increased demand.

A. An antigen is any foreign substance (such as bacteria, viruses, or toxins) that triggers an immune response in the body. The immune system recognizes and responds to antigens, typically by producing antibodies.
B. Inflammation is a response of the body to injury or infection, characterized by redness, heat, swelling, and pain, but it is not a foreign substance itself.
C. An allergen is a specific type of antigen that causes an allergic reaction. While all allergens are antigens, not all antigens are allergens.
D. A lymphocyte is a type of white blood cell involved in the immune response, but it is not a foreign substance. Lymphocytes help recognize and respond to antigens.