Which of the following is NOT a component of lymphatic tissue?

The liver is not a component of lymphatic tissue. Lymphatic tissue is primarily involved in the immune response and comprises various organs and structures that contribute to the production and maturation of immune cells, as well as the filtering and collection of lymph fluid.

The thymus, spleen, and lymph nodes are all integral parts of the lymphatic system. The thymus is essential for the maturation of T lymphocytes, critical immune cells. The spleen helps filter blood, removing old or damaged red blood cells and also plays a role in immune responses. Lymph nodes are key sites where immune responses can be initiated, as they filter lymph fluid and serve as areas for immune cell proliferation and activation.

In contrast, while the liver does have some immune functions and is involved in the filtering of blood, it is primarily considered an organ of the digestive system, responsible for metabolizing nutrients and producing bile, rather than being part of the lymphatic system.