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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

Channels within the lymph node that allow for the flow of lymph through the node.

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

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

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