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Fluid that circulates throughout the lymphatic system, contains lymphocytes and helps remove toxins.

White blood cells that are integral to the immune response, protecting the body against antigens.

Gland where T cells mature and differentiate, essential for adaptive immunity.

Small, bean-shaped structures that filter lymph and trap pathogens, helping to activate the immune response.

Filters blood, removes old red blood cells, and hosts immune reactions.

Participate in immune response by trapping pathogens that enter through the mouth or nose.

Lymphoid tissues in the small intestine that monitor and respond to pathogens in the digestive tract.

Acts as a lymphatic tissue by helping to expose white blood cells to antigens and contribute to gut immunity.

Lymphoid tissue associated with mucous membranes that protects the body from invasion at mucosal surfaces.

Transport lymph fluid back to the circulatory system and help prevent tissue edema.

A dilated sac at the lower end of the thoracic duct that serves as a storage area for purified lymph.

The main lymphatic vessel that drains lymph from the majority of the body into the bloodstream.

Drains lymph from the right upper quadrant of the body into the bloodstream.

Site of lymphocyte production which gives rise to B cells and precursor T cells.

Prevent backflow of lymph fluid, ensuring unidirectional flow towards the heart.

Small localized clusters of lymphoid tissue that are the sites of B cell localization and proliferation.

Tiny, blind-ended tubes where interstitial fluid enters the lymphatic system to become lymph.

Connective tissue fibers that help anchor the lymphatic capillaries in the tissue matrix.

Carry unfiltered lymph into the lymph node, where it can be assessed by the immune system.

Transport filtered lymph away from the lymph node, engaging the immune system if necessary.

The indented part of a lymph node where the efferent lymphatic vessels exit and where blood vessels enter and exit.

Thick fibrous layer that encloses the lymph node and provides protection and structure.

Outer part of the lymph node where B cells proliferate into plasma cells.

Inner region of the lymph node that contains histiocytes and plasma cells.